I can't get the gun glitch to work, do you need to buy the gun as soon as he pulls the needle out? Like right before he starts reviving the guy? I've been trying to do it when it's in the middle of reviving that might be what it is maybe i'm doing it to late.........We made it to 27 last night and ran out of ammo AGAIN. It's like the game know's your out of ammo and won't give you a max ammo, it will give ya all the kabooms, carpenter's, and instakills you want.....