This is a video from Slow Mo Guys Gav and Dan, who teamed up with funlovers Aussies Brett and Scott of How Ridiculous (when Youtube worlds collide!) to fire a bowling ball out of a cannon at 400MPH and directly into a realistic ballistics head, complete with skull. After watching the video, I can say with some certainty that you should probably try to avoid getting hit in the head with a 400MPH bowling ball if you like wearing hats.