While I'm still a week away from my P3, my friend has invited me to the roof of his building to fly my P3. Now we're talking 40 stories up on the Chicago lakefront. The videos could be epic. The chance for disaster seems just as epic. If I lose it from up there, it is gone for good, even if it doesn't go into the lake. OK, I will have a cellular transponder on it, so I might find it. Has anyone ever flown like this off a very tall building?