DBCherry's diagram is a stall turn or hammerhead. If you look in the AMA rule book about scoring the maneuver, you are allowed (from memory) one wingspan.

A wingover is simular, but the plane doesn't loose forward motion, and the up and down lines are separated farther apart. Basically, if you try to do a stall turn/hammerhead and don't slow down enough or apply the rudder too much too soon, you get a wingover and a 0 score for the stall turn .