I may have the record on how many loops a Apprentice will do on a full battery before it met the gound. The Elevator locked up in the up position. It just kept looping and it realy didn't do much damage once I figured out what and why it was doing it just backed off the trottle and the last loop low to the ground choped the power. Just a spinner and bent the landing front wheel back some and it was ready to go. They are real tuff birds. Had to replace the gears in the servo and was surprised to find out the elevator servo had mostly metal gears. Wish they were all metal but were not. It could have been a lot worse.