A simple effect but it works surprisingly well.
That is awesome.
I respected Russians much more during the cold war when they were a force to be reconned with and not just more clowns posting stupid crap on YouTube.
That totally fucking rocked!
Such a simple gag, but I couldn’t stop watching or being amazed at how my head kept getting fooled! Every 10 or 15 seconds I found myself giggling at how my brain kept trying to misinterpret what I was seeing! Truly Let’s go to the quarry and throw stuff down there funny!
Thanks for linking!
Choreographing that would make my head explode.
That was really cool. Thanks for sharing.
The effect didn’t work for me I’m afraid. I can’t get why everyone was laughing. 
Me neither. Okay, it was a cute gag, but after the first little bit, it was all the same thing over and over.
It works better if you just watch their legs.
The video is from Germany. Here’s an American posting of it.