CrossFit®, the name-brand fitness craze that you shouldn't participate in for several reasons, is still growing in popularity, with more WODs killed every day. And while CrossFit will get you in shape (if it doesn't give you a crippling case of rhabdomyolysis), it might not make you look like the badass you've always wanted to be. Case in point: These people.
This video isn't really a knock on CrossFit as an exercise program (although you should probably do pullups in a manner that won't make your hands look like this) but it does teach some important lessons about checking your equipment, having a spotter, and not lifting things you can't actually lift just to finish the workout of the day.
If you're going to do CrossFit, at least be smart about it.