Video Of Synchronized Wind Tunnel Sky Diving

You could make a pretty good argument that this is synchronized flying.  Watch these four dudes go crazy at an indoor skydiving facility.

I wonder if fat people can do this.  I know I couldn't.  Can you even imagine what that's gotta feel like to do this?  Also, can you imagine how long it took to practice?  I almost wanna call BS on this, but it seems pretty legit.