Many birds of prey exhibit this behavior called cartwheeling. According to raptor observers, cartwheeling can indicate a mating dance, a foiled burglary or an aerial duel. Two flying raptors lock their talons and fall together, spinning together until they release their grip. Sometimes, they hold on as if daring each other to let go, and may even fall all the way to the ground. The crashing is seen in as many as one of every five such cartwheeling encounters, but is not often fatal.