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Eoin's Slippery Slide

Sniper007 says...

I'm in the process of rearing 6 boys, oldest is 7 years. I wouldn't stop recording either. The greatest danger is the boy will now seek greater adrenaline rushes later in life.

Impatient Driver Destroys Caravan

Digitalfiend says...

...or assuming this video is from a truck, it's possible the leading left corner of the trailing caravan caught the rear of the truck as the car passed, causing the car to veer to the left into the path of the truck.

yellowc said:

No I don't think the accident is avoided even without the caravan, to me it looks like the car may have got clipped, judging from the angle at @0:18.

The caravan looks like it just came along for the ride, it gets pulled apart by the severe bending, not a direct hit.

Porsche Cayman S driver fail

dacro says...

Stick or Porsche PDK, there is no brake lights after taking off from the light. As he floats it sideways there is no light up of his taillights, or brake light bar in the rear window.

He only taps his brakes going OVER the median, not before (0:16)

After he gets back in his own lane, and tries to drive away the embarrassment with more throttle (no brake lights through this bit either). The partially broken spindle became fully snapped.

Drive instructors prank

blackfox42 (Member Profile)

How Digital Light Processing (DLP) Works

spawnflagger says...

The Ti DLP chip is the most commercially successful MEMS device created. I own a DLP projector(720p) and a rear projection Mitsubishi DLP TV (1080p). I like that DLP chips can give you 3D (in a checkerboard pattern) basically for "free", and it looks better, IMHO, than other 3D displays which also use active-shutter glasses.

Some nitpicking - most home DLP projectors use a 6-color wheel, not 3.

He also didn't mention that most digital movie theaters use DLP - although this is a a more expensive system, because there are 3 light sources and 3 DLP chips (RGB) instead of having a color wheel - and they are larger chips with more mirrors.

Red Neck trucker says NO to this blonde trying to merge...

Lawdeedaw says...

Huh...the car actually slams into him on purpose to avoid rear-ending the other semi...that is humorous because it was 100% intentional. You see the car jerk, and I watched it multiple times to see if he hit something beforehand that would cause it to swerve and no, it did not...that is one hell of a felony.

Just because he lost the fight he pulled that bullshit? Whoa, I would have hated to see some kid's brains splattered on the street because someone purposely rammed another vehicle while being a dick...might have been road rage or w/e...

As far as the gap closing, yeah, it is pretty obvious the trucker doesn't want the car to cut in front of him when it isn't legal or right for that to happen. The trucker has this right because it is this forced-tailgating when people merge that causes accidents. HE OBVIOUSLY MAKES AN EDUCATED GUESS THAT THE DUMB BITCH WON'T RAM HIM, but he is proven wrong.

lucky760 said:

TLDR, but I'm on board with @newtboy. The trucker really seems to be intentionally closing the gap only after the VW starts to enter the lane (I'd assume to teach "this blonde" a lesson). Before then he is maintaining a steady distance from the Nissan.

Also, really interesting sight at 0:30 to 0:33 is you can see that only the front tires on the other truck have completely stopped spinning but continue travelling forward as if they're still turning.

Crazy street racing! Peel Kart Race - On Board

dannym3141 says...

It's wind resistance, it makes a massive difference. When they're really far apart the rear driver is just driving better and shaving time off the lead, so he catches up, but once there it's down to drafting to get the little burst of speed to get alongside. The carts are probably approximately equal in power, so he reaches level from the draft position easily enough, but can't keep the momentum to get a lead with the new air resistance on him, just draw level. So they're level, but obviously there's only one sweet racing line to take to keep your speed up and lap time down. You can either pass on the outside (in which case you have to go faster into the turn to stay ahead) or the inside (in which case you have to turn sharper at speed to stay ahead) both of which are risky, or you can return safely to the racing line - i.e. not by swerving into him, but by conceding the lead to him and dropping in behind him. If you do that, you take less risk and give yourself the chance to try again because you're in draft position again. He needs to stay as close as he can and find the right place to overtake so that his superior driving can give him the lead into the racing line of the next corner, at which point he gets right of way and the position advantage the lead gives. Sometimes that's not even possible and lead to what some would call boring races (Monaco Grand Prix) where the leader is decided on the first corner and doesn't change unless they crash out.

I'll draw two parallels:
1. DRS in F1 racing, where a tiny part of the tail opens up for a small part of the track, which drastically increases speed and allows for more interesting races because it almost ensures overtaking. You can also see the same application of the racing line and people conceding position or trying to take different lines and spinning out or locking up.
2. In cycling, the commonly quoted figure is that you can save 40% of your energy by drafting behind a leading cyclist. The Tour de France and every other cycling road race is defined by drafting, cos no lone cyclist would ever be able to keep pace with the peloton which 'cycles' riders in and out of the wind-protected bunch throughout a day. This should convince you more as cyclists are not streamlined objects but still offer significant gains. Go and watch a cycling sprint finish - it's a case of whoever gets behind the fastest guy wins by conserving energy in his wake until it's time to burst out alongside and pass.

Inside a Camera at 10,000fps - The Slow Mo Guy[s]

deathcow says...

In one example (I hunted out in the video) at 1/1000th second the front curtain is moving faster than the rear curtain and looks like it would overexpose the bottom of the frame slightly.

How an Aussie postman deals with dogs

Digitalfiend says...

I don't generally mind the delivery guys giving my dog a snack, usually small milk bones, but I do get newtboy's point. My Lab broke part of his upper rear pre-molar (the big looking ones with double-points near the back) and I didn't want it pulled so about $3000 and a root canal later, he has a cool metal cap. Unfortunately, if he gets something really hard and/or the wrong shape, there is a chance it can pop off; it's happened two times already and that means extra trips to the vets to be put under and have the cap re-glued. That's $$$ and lots of stress for my dog.

So far everyone has asked before feeding him so it's all good but yeah I get it. My problem isn't so much food as having to tell everyone not to play tug with him (plastic Frisbees, nylon ropes, etc.)

I think the guy in this video has probably gotten permission to feed the dogs; though with some of the more aggressive ones he probably just does it to try and establish a rapport with the them.

Close Call on the New Jersey Turnpike

Westjet 737-700 pushed across the tarmac by strong winds

sumdumfu says...

looks to me like it wasn't chocked properly. in conditions like that there should be double chocks on every wheel but i'm pretty certain they didn't even chock the rear wheels.

source: I've worked for UPS airport (ramp) operations for ten years.

Strike! Or not...

nock says...

Good question. Here are the rules:
"
6a. Legal Pinfall
Pins to be credited to a player following a legal delivery shall include:

Pins knocked down or off the lane surface by the ball or another pin.
Pins knocked down or off the lane surface by a pin rebounding from a side partition or rear cushion.
Pins knocked down or off the lane surface by a pin rebounding from the sweep bar when it is at rest on the pin deck before sweeping dead wood from the pin deck.
Pins that lean and touch the kickback or side partition. All such pins are termed dead wood and must be removed before the next delivery.
No pins may be conceded, and only pins actually knocked down or moved entirely off the playing area of the lane surface as a result of a legal delivery may be counted."

So....I am not sure if it is considered down since it was moved off the lane surface and then ended back on the lane surface.

World's Simplest Electric Train

newtboy says...

Not a credentialed physicist, but I'll give it a shot.
The metallic magnets make contact with the positive and negative on the battery and feed electricity to the coil, that induces a magnetic field in the coil. With the magnets arranged properly, the field in the coil likely attracts the 'front' one and repels the 'rear' one, making the 'train' move, and taking the induced field with it.

(If I'm wrong, please correct me)

The bobcat didn't know I was there... For almost a minute.

Chairman_woo says...

Pretty sure it's a bobcat though they are easy to confuse.

I reference this http://travel4wildlife.com/wp-content/uploads/2014/01/lyx-vs-bobcat2.jpg

Specifically I'm thinking: short tufts, visible spots, and rear legs & hips similar length to front and most significantly longer tail. (Lynx barely has enough tail to swish unlike this chap)

To my eye you can tick off all the main bobcat signifiers here anyway.

Edit: Lynx Rufus is a Bobcat! (should have read further before commenting DOH!)



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