User blog comment:JackFrost23/RDR Cheater Exploits and "The Bubble Gun"/@comment-10278667-20110621161210/@comment-1265875-20110621225345

@The last two comments - Actually, there is a way to get the Infinite Health Glitch in a Gang Match. It is currently the most closely held secret exploit in the game.

Unfortunately, I have yet to meet anyone that knows how to pull it off, and I'm sure that no clan will tell me unless I join (which I will not).

Last Saturday, we encountered an RDS and an EPT in a room by themselves during a Hold Your Own in Armadillo. They survived 2 headshots apiece (there were 4 in my posse) in the shootout and they stood in the open at the end of the street, the RDS grabbing our bag and the EPT shooting as many of us as he could while we spawned - using the Rapid-Fire Glitch, of course.

No amount of bullets or headshots would kill either of them (which is probably how they ended up in a room all alone). Even concentrated fire from two different directions wouldn't phase them. So the Infinite health glitch is alive and well in Gang Matches somehow.