I have never crashed and always practiced smooth landings. I have never had a problem with my P2V until today. I set it up to fly, and when I start the motor up, all seemed well. When I pushed on the stick to take off, it seemed like the back two props didn't have enough power and my P2V just tilted backwards. The front two props work just fine as they seemed like they wanted to take off. I took the props off and started it up. I simulated a full power take-off, and once or twice there was a sound that was like a hang-up. PLEASE HELP! FREAKING OUT!