Since I fly at my own field, I almost always fly alone. It is up to me to be certain before I do anything, that everything is the way it should be. I think of my own personal safety, and fly as if I have spectators to be careful of behind me. I don't fly directly over my head, or behind my runway, never over the pit. I do have an advantage, just behind my pit is a "real" tree that needs to be avoided for collision purposes.