I choose an auto, but I must admit that a revolver would not have jammed in this situation. An auto is sensitive to jamming up due to a sloppy grip, such as we see here, where the guy put his support-hand thumb behind the slide. Did he know he wasn't supposed to do that? Did he have lots of live fire practice doing it right? Almost certainly yes to both. What happened was that he was overwhelmed by the urgency of the moment, and his motor coordination went to [bleep], resulting in a catastrophically incorrect grip, causing the jam. I don't think there's such a thing with revolvers. I'm sticking with my Glock, but this is a legitimate point to take note of.
