Every summer we have this one plane that stays for hours doing aerial acrobats, mostly barrel rolls and loops. He's been doing it for over 4 years, I can recognize the plane even by the sound of the engine.
I usually sit out in the yard when I hear it, because it's cool to watch, but I'm waiting for him to stall out on a loop one day and put that damn thing through the roof. I'm thrilled and freaked out at the same time I guess you could say.