I had a Parkzone Trojan on the kitchen table working on it with a battery in it and the prop still installed, motor armed, but hey I'm careful and no dummy, riiiiight?. Somehow I mistakenly reversed the throttle channel. It is amazing how fast that little plane accelerated when the motor went to WOT in 1/100th of a second. It smashed in a spectacular manner into the front wheel of my mountain bike just five feet away.