The funniest thing me and my mate did was on Spillters 2, on story co-op on the siberia level. We got in a lift and as the door closed a zombie came in as well. My mate didnt have any ammo and i had a soviet but i only had grenades so if i had shoot him we wud of all died. The zombie was gonna kill my mate so i shot a grenade and as i did this the lift stopped and the doors opened, so i jumped out and turned to look at what was goin on and i just saw my mate and the zombie flyin out of the lift cos the grenade exploded and they both almost hit the wall. it was so funny.Had to be there tho