Ok, I went to Florida to play in the MI 2001 Camp Blanding game. I was running into a building when I slipped on the paint in the doorway and busted me arce. My gun, hopper and tank hit the floor pretty hard as well. When I got back to truck to take a break, I noticed that the blades weren't spinning after I emptied the hopper. I replaced the batteries, nothing. I took the hopper apart and wiggled the circuit board and still nothing. Every once in a while it'll spin for a second if I mess with it, but never consistantly.