I was playing Left 4 Dead 2 with my xbox friend Dave and we were going through the Dark Carnival Campaign while only using melee weapons. (which we didn't get the acheivement cause apparently you can't use pistols!) Then we were in the Tunnel of Love area and the part before the maintenance room with the swan boats. Well there's a dark room with 2 doors in it and a grate entrance. Well there was a Witch right in front of the door leading directly to the actual ride. We sneaked past her through the other door. Then I was bored so I went to the door and opened it. It pushed the Witch into the wall and then startled her... But she didn't attack me. She just started running in the hurt animation. And all I could do was laugh.