From what I can find...timers and/or sensors that arm them after being deployed.
Weighted bottoms and/or little parachutes. Many types function in any position too, so upright doesn't matter.
Even ground based deployment is usually tossing them mechanically from a vehicle by the thousands, not by hand.

https://videosift.com/video/M139-Volcano-Mine-System

Crap. I wanted to like this video.
Unfortunately this starts with bad information and gets worse...claiming Yellowstone is the largest super volcano....but Yellowstone's biggest eruption was 2,800 km3 almost 9000000 years ago.... Toba in Sumatra erupted 13,200 km3 only 75000 years ago. The most recent Yellowstone eruption was around 640000 years ago and only 1000km3.
Even Taupo ejected 1170km3 in that last super eruption, far more than Yellowstone's most recent.

Where did they get the idea that an ash cloud would spread in every direction evenly?! It's just wrong. The ash cloud would be blown East by upper atmospheric winds...eventually circling the globe but not expanding to the West very far....just like previous eruptions did.

They mention America going abroad to get food in such an event, then go on to mention global dimming, temperature drops, and sulfur contamination damaging crops...but don't put the two together. In such an event, no country on earth could feed it's own population, much less have a surplus to sell to the worst hit area, America. In 1815, the year without a summer caused world wide famine, epidemics, and a halt to shipping because winter ice packs remained through the summer in many places, and crop failures and epidemics continued for years afterwards. That eruption was only 160–213km3 and there were under 1 billion people to feed on the planet.
A large Yellowstone eruption would be 4-10 times that size, with effects being worse and lasting longer, and there are around 8 times as many mouths to feed.
The largest eruption we know of was nearly 100 times the size of Tambora in 1815....and wasn't Yellowstone.

https://en.m.wikipedia.org/wiki/Supervolcano

Edit: let's not forget the disruption to airlines for possibly years and interference with satellite signals like we've never experienced....and what does that sulphur do to an already acidic ocean?

I want to know his sources, because they don't jibe with historical records.

Congratulations! Your video, EPIC DRONE CRASH into ICELAND VOLCANO ERUPTION | DJI FPV 4K, has reached the #1 spot in the current Top 15 New Videos listing. This is a very difficult thing to accomplish but you managed to pull it off. For your contribution you have been awarded 2 Power Points.

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Your video, EPIC DRONE CRASH into ICELAND VOLCANO ERUPTION | DJI FPV 4K, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

Not a problem. Would you like an "in the dark of night" pickup?

Florida is void of volcanoes so there will be a small upcharge for the second final destination.

A cool video from the volcano

Your video, Lava flows out as Iceland volcano erupts near Reykjavik, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

Tags for this video have been changed from 'Lava flows out as Iceland volcano erupts near Reykjavik' to 'Lava, Iceland, volcano, Reykjavik' - edited by eric3579

As far as I know, the Icelandic people are the only ones in history to successfully redirect a lava flow (excluding Tommy Lee Jones). They got this.

[ In January 1973, Eldfell volcano on the island of Heimaey erupted an ‘a‘ā lava flow. Over the next 5 months, billions of gallons of seawater were pumped through an elaborate network of pipes laid out across the lava to cool the flow and slow its advance toward Heimaey's only harbor, the lifeline of the island and a critical economic resource for the entire country. The fragmental nature of the lava flow's surface allowed the seawater to penetrate deep into the flow and cool the lava near its core, and the advance of the flow was slowed as the flow front thickened dramatically.]

Your video, Volcano Erupts in Karo, Indonesia, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

Carefully

None of the endothermic reactions in this video have been suggested as methods to regulate global temperature, because even if they could be scaled up enough to make a global difference they don't address the systems which regulate the earth's temperature.

Some things which have affected global temperatures either up or down are:

• Volcanic eruptions can cause global cooling, for example the 1991 Mt. Pinatubo eruption released around 20 million tons of sulphur dioxide causing global cooling of approx 0.5°C over the following three years (ref: https://earthdata.nasa.gov/learn/sensing-our-planet/volcanoes-and-climate-change and https://pubs.usgs.gov/fs/1997/fs113-97/ )
  
• Increased rates of erosion of the right type of rocks can increase CO₂ absorption and reduce global temperatures that way, https://earth.stanford.edu/news/how-weathering-rocks-cooled-earth#gs.cmy3h0
  
• Cyanobacteria, https://www.caltech.edu/about/news/evolutionary-accident-probably-caused-worst-snowball-earth-episode-study-shows-1026
  

Somewhat similar.

https://videosift.com/video/Moon-Setting-Behind-Pico-del-Teide-Volcano-Tenerife

Not one single mention who the winners were for best potato battery or volcano experiment.

Forgot the volcano.




I wish someone would thank them for getting rid of the death panels.
Funny how people forget the bullshit scare tactics used to turn people against their own health care.
Funny how people forget why we needed the ACA in the first place, and why our health care is so expensive....we don't turn away people who can't pay. Instead we bill them at two to three times the price the insurance companies pay, then pass the cost on to those who do pay after ruining their financial future.
No, wait, none of that is funny, it's just dumb.

Why is there a Winnebego driving through the super volcano explosion 300,000+ years from now?




(I'm kidding, I just know that's from 2012 along with half the other scenes)