I didnt mean by putting your finger over the carb. If you stop the engine with the wheels turning, meaning that the clutch is engaged, doesnt matter ho you stop it, then if the motor cuts off as its going to top dead center, then sometimes it can rebound and the piston goes the opposite way because of the compression of the engine. this will turn the entire clutch the opposite way the wheels are spinning, and sometimes if your motor was spinning fast enough it will strip a gear. very rare, but it does happen. And to timrock, I know the motor is off but because all of this happens within less than one 100th of a second the clutch does not have time to disengage, sometimes. Im not saying this is common occurence because its not, because so many things have to be happening just right.