Heh. I'm an engineer. My first dungeon had several "stage effects" traps on the first level. One was a breakaway door with a pit behind it. (For those muscleheads who think checking for traps is "wimp stuff.") Then there was the "Door Knocker." A heavy wooden beam is attached to the ceiling by a hinge near the door. The other end has a heavy stone weight, one end sticking down, latched to the ceiling. The trip line for the latch is connected to the door. The door is opened from the other side, and...