Only about the first 15 seconds of this video are interesting. But because it’s in French, it takes another minute and 45 seconds to provide the context. So if you only want to watch the super sweet part, here’s what happens: One dude tries to pull some lame prank on a passerby in a hat. The prankster takes off running, right past another random dude, who just happens to be awesome at karate. Now, watch.

You know when you think about how you would act in a hypothetical situation? Well, I’ve often wondered how I’d react to being “punked.” And I have a creeping suspicion that I’d freak the hell out. I guess that’s why this seems like a perfectly reasonable response…