Dude! I backed off There is one post, But I mean it! helis are seroius, you have to think about the surrounding situation BEFORE yoy fly. Granyed 450s are probably not lethal a glow .30 or a Rex 600 electric can inflict some serious injury! Park flying is to be considered carefully ( or similar public flying) even if a person is an accomplished pilot, you dont know what spectators may do. couple this with the possibility that if you are flying 72mhz any number of people may show up with out of the box helis possibly on the same freq. sending your heli where you never intended. this is an example of someone not knowing proper proceedure. I may not always agree with the AMA, but the proceedures the have established about model flying are important. I say this because a friend of mine an was severly injured by some one who just showed up and flew improperly and this was at a club.