I don't think you understand that a bunch of unarmed people trying to jump on someone doesn't do stuff when said person has an assault rifle. You just shoot the guys holding onto you and they release when they, you know, die?
When ever shootings occur, I always imagine some big (FAOTBAL big) guy just charges and tackles the mother forgeter from behind and disarms him, and continues to punchpunchpunch until authorities arrive.
Totally unrealistic, but stuff; tackling when your completely bigger, from behind, while pulling weapons out of the attacker's hands just
sounds like a good idea.