A funny episode happened one year at The U. S. Nationals / Indy. I've always loved fireworks and airplanes, so there were many occasions that I used both during pre-race ceremonies at national events. It was really impressive (when the timing worked out right) to have a low level (REAL LOW) flyby by a warbird, right on the closing note of the national anthem -- followed by a barrage of aerial bombs the instant the plane cleared the end of the track. Well it worked perfectly at Indy that particular year. Too good in fact! 

The airplane, a P-51 doing about 350 mph, came in so low that many of the surrounding residents did not see it climb out at the end of the strip. When the aerial bombs went off... Well you know what they thought. The police and security radios got real busy, real quick. Local fire departments were dispatched, looking for a non-existent disaster. While the fans were enjoying the first round of Top Fuel, I was scrambling to get all this stuff calmed down.

The authorities seemed the actually find a little humor in at all, but I'm certain than some of the neighbors are still wondering what happened. No harm...no foul.