Sure, he’s in pain, but think about what a nice stretch this is for your hamstrings!

Stretching is an essential part of exercise. That said, it also sucks to do — it’s boring, and while your body may thank you afterward, the process of actually stretching the damn thing out can get pretty painful if your muscles are tight.

Given this pain, some people employ stretching machines to help them extend beyond the limits that their body would usually impose. Sometimes, this is good, allowing you to get a deeper, more effective stretch. Other times, like in this video, it causes people to get stuck doing the splits, making for an embarrassing trip to the emergency room.