Warriors of Wrestling
The stunt work in SGABTO was made possible by the Warriors of Wrestling organization from Staten Island, NY. They provided us with their best athletes to play the roles of several luchadores. W.O.W also trained our protagonist Tim Duffy, so that he wouldn't get killed in the ring. They were successful, by the way, he's still alive.
Check out the Warriors of Wrestling stars that are featured in Some Guys Are Bigger Than Others.