You are one of the killers, your job is to kill all of the survivors. Typically you'd do this without getting super annoyed but Noob was making it extremely difficult to not. Noob had a little wooden slingshot that he would use to shoot tiny pebbles at you, sure they didn't stun you but they were REALLY annoying

You were chasing down another survivor, one more hit and they'd be dead when you felt another pebble hit the back of your head