User blog comment:JackFrost23/RDR Cheater Exploits and "The Bubble Gun"/@comment-10278667-20110621161210/@comment-3992827-20110621161847

I think your right that the Rapid-Fire Glitch is just someone using Dead-Eye (It does shoot really fast). The only glitches I've seen have been the once-in-a-while person riding an invisible wagon.