Gym Class Obstacle Course Didn't Go as Planned

We never did anything CLOSE to this cool in my gym class.  Kids at a school in Chicago got to run an obstacle course the other day, where they had to climb a huge mountain of milk crates.  

A video of it is blowing up on Twitter, because one girl had a pretty rough run.  Whoever was working the rope attached to her safety harness yanked too hard . . . lifted her up off the ground . . . and she crashed into the milk crates headfirst.