I used to take string and tie it from the mantle over the fireplace to the bottom of the railing on the stairs (maybe 25' or so) and make the Gi Joes "Join the battle" by riding the zipline down. The Cobra people would always shoot at the Gi-Joes as they were coming down the wire but they never got hit. Well.. I guess the good ones never did. I remember the fridge RARELY made it into the fight.