The Slow Mo Guys on YouTube posted a new video where one of them gets drilled in the face with a soccer ball.  Which they also did a few years ago at a thousand frames per second.  But this one’s 28,000 frames per second, so it’s a lot better. They filled the ball with WATER instead of air to make it heavier . . . which is like asking for a concussion. Basically, his skull moves first, and then it takes his face and hair a little while to catch up.