Treadmill pain
I had a treadmill disaster once and I was thrown into (thank God) a padded wall. My friend and I thought it might be funny to see just how fast a treadmill ran and then she dared me to jump up on it... I don't think my feet ever touched the rubber but my thigh did and I had rubber stuck in every pore of my upper leg. For about two months I had to pick the rubber out with tweezers. Ouch!
Dumb people do stupid things. I'm way smarter now.