Blatent lack of experience.. You could see as soon as he took off, like everyone else mentions it is a miracle he didn`t land on a person or a car windscreen... The road should have been closed off for a stunt like that, at least it would have to be here in UK? I have flown in very built up areas with skyscrapers around but only within the area I have permission to fly in, there is a slight GPS problem sometimes, but it will never cause the machine to lose control? just not hold position, but if you cannot fly without GPS and self levelling then it`s my opinion that you shouldn`t be flying anywhere that would pose danger to the public, just in case there is a failure, you need to have the skills to bring it in safely. Learn to fly with a KK board first. This type of incident will sort the men from the boys, but also make people more reluctant to employ a UAV operator, and the authorities to make regs much harder. A Multicopter constructed for the right purpose is, in the right hands extremely safe.. Hexa`s and Octos are safer than full size in my opinion if a proper method is applied to carry out a safe flight.