Our local EAA Chapter held a flour sack bombing contest in conjunction with a Young Eagle event.
I used 2 Nflightcam Contour(now defunct) video cameras mounted on my Sport Cub and a 3rd video camera mounted on a tripod near the target. I even used some footage from my wife's iphone (I reminded her to hold the iphone horizontal next time). This was my first time using multiple cameras and editing with Final Cut Pro. Very amateurish but fun to do. Of course we won the competition, scoring the best 2 drops. It was almost cheating in the S2!