Hilarious exercise ball FAIL video (with a twist)

(CBS) - For some reason, exercise balls and FAIL seem to go together like peanut butter and jelly when it comes to YouTube videos. This 4-second long clip is another case of that happening, but with a rather surprising twist at the end.  Yeah, you know you want to watch this one...

I always wonder what exactly is the conversation like when the idea to run at each other with exercise balls ends up sounding like a great idea. Even the best-case scenarios aren't all that appealing when you think over the end-results.  Or is that just me?