This everything you shouldn't do - all rolled into one. Always preflight check everything. The battery would have failed at this. Second, if you launch into a pre flight hover and check all controls, you would've noticed how unstable it was. This would have grounded most pilots, too. That had to be the worst location to launch I could imagine. The concrete is known to cause interference and the walls on both sides are too close, for me. The wire directly over the launch point would have also scrubbed the location, for me. I like room for error. Beyond all that, you should have landed at the first sign of trouble. The aircraft was keeling like a boat on the ocean, the whole time. You have to think about safety, when operating. This thing would seriously injure or kill somebody if it fell on them. What's even worse is that you never even stopped the motors, until your own safety was a concern. The blades could be heard scraping the pavement the whole time, possibly damaging the motors. When the guy tries to pick it up, you throttled up! Those blades can do considerable damage to a persons hand. You could have been on the hook for medical expenses, too. In the end, you didn't hurt anyone and probably totaled your aircraft. It may not have been a big deal this time, but please consider others before flying again.
