WHO is going to be so inept as to just stand there and let you shoot at them for 2+ seconds? That's how long it's going to take to get to the 3rd guy, starting from realistic concealment and firing (adequately careful) doubles at each of the first 2 guys. I mean, have they only got spears, or why are you shooting at them? If they have guns, 2 seconds is time enough for them to fire a lot of shots at you! And realistically, it's going to take most people more like 3-4 seconds to get to the third guy (if they actually get ONE good hit on each of the first 2 attackers.