We had in our yard a big smoker/grill set up with dry ice to make it look like we were cooking something. My husband had a mask on and a butchers apron sprayed with fake blood. We had a group of teenagers (we always save the scarier stuff for the older crowds) coming towards us to "trick or treat" and my hubby yelled, "Awww, fresh meat for my grill" picked up a chainsaw that was hidden at his feet and started it up. The biggest, and probably oldest, teenager turned tail and went running down the street screaming "Dude's got a chainsaw, Dude's got a chain saw!" His friends turned and joined him running away while we had a huge laugh.