I don't mean to sound like an ass, but are you sure you took off a wingtip?
I once could have sworn I took off both Elevators from a Hog, but as it turns out, it destroyed neither. I don't know what those bits and pieces were coming off, but they weren't what I thought they were.
I'm assuming you saw the big missing wingtip, and not just parts falling off though, right?
-Sik