This one has been mentioned many times on here, but I'll never forget it. Remember in the beta when you'd go down into that bunker to the left of where you'd spawn in the Cosmodrome and you'd get that 'respawning restricted' notification? While fumbling around down there, I will never forget the sheer terror I felt as that Knight and two Acolytes came running out of that back room with the red '???' above their heads. And the simultaneous thought of what the FCUK is that, coupled with the bolt of lightning that shot down my spine as I retreated in tears!