Um, so why did t fly out the "down" side of the escalator?

Gravity?

Sure, but if a customer was trying to push it to the upper floor, they would have been using the "up" side of the escalator, not the "down" side of the escalator...

Gravity doesn't apply on the "up" escalator?

Yes, which is why it should have fallen down the "up" escalator. Please feel free to continue to fixate on gravity though...

You have this cartoonish idea of physics I guess. Try to push a shopping cart onto an escalator, and see if it just sits in one place, slowly turning over... and over... and over.. until someone comes to get it.

No, it's going to rocket down the fucking escalator, bouncing off the steps and the sides, until it goes flying off the bottom killing a small village.

Where did I ever say it was going to sit in one place? Only you said that. Why quote me if you're not even going to read the first sentence of what you quoted?

No, if you let go of a cart on the "up" escalator it's going to fall down the SAME escalator (the up escalator), not the one NEXT TO IT (the down escalator).

I'll be more blunt:

It's obvious (well, to anyone that has moved beyond video game physics) that the YT description that was pasted here was wrong. The shopping cart person wasn't pushing the cart "to upper floor", it was being pushed from the upper floor.

@Raveni I see now, indeed, I misread your original comment. Why indeed did it come down the "down" side if it was supposedly going up?

Why, oh why, would someone put incorrect information in a youtube video description? Has the world gone mad? Don't they know this is serious?

Who the fuck cares.