I'm saying that put in a situation where escape wasn't possible. I have read where the shooter was between the victims and safety. That I would not wait to be shot. I would charge the shooter rather than be a passive victim. If the 2 who tackled him were blocked by the shooter than they waited for others to die before they had a safe opportunity to tackle the shooter. If they were not blocked, then they most likely were behind the shooter and had plenty of opportunities to stop the shooter before he was out of ammo.