What is it called when you do this?

I'm surprised so many people are answering just to call it stupid or idiotic. The question isn't about it's application or logic, just the name. That said, I do still have to agree that it's not a powerful kick, or very realistically wise.

Drop Kick.

I call it Vovinam termination kick without landing on your feet.

https://www.youtube.com/watch?v=g1WkMroGXT0

0:08 seconds in

You might also be interested to know that they love the scissor kick

The name is drop kick, and as everyone mentioned not exactly a powerful or efficient technique. Just looks very dramatic.

Crazy, that's what it is called in martial arts but it looks real good in the movies or demos. So try and ask this in the movie section. Their choreographers might have a name for this. Martial arts does not.

@ Oliver: HEY, those guys are cheating. They got mats. I want all the dark back alleys in my town to have mats like that just in case I am attacked an need to fight like that.

flamingo blitz falcon stupifying ultimate kick of the devil living in a volcanic pit with 2 little puppies.

It's called idiocy.

Impractical kick that leaves you vulnerable and hurts your back.

stupidity

try that and see what shape your back is in after your done. your not going to land softly on the ground

That's called a retard.

It's called stupid