So I can finally admit that I've had my first crash. I hit a tree branch across the cul-de-sac while trying to film fireworks in the foreground and us in the background. It hit, stopped suddenly, seemed to get hung up in a branch and then fell, catching a branch on the way down. I ran over and the battery had popped out, it looked OK except for some grass at the base of a motor. I turned it back on, took a bit to recalibrate and then said GTG. I took off and it flew just fine. WHEW! Lesson learned... minimal beer and stay focused!