I've had about 80 successful flights between my two phantoms. I bought a P2V+ in July of 2014 and a new P2 with H4B about a month ago. I've flow the new P2 enough times to be very confident with the system, and eliminate "out-of-the-box" issues and fear of mechanical errors, etc. On Friday evening I went to a park I had flown before, quickly unpacked everything, calibrated, had like 8-9 satellites, and took off. I didn't do enough testing at low altitude, and took right off towards higher skies. Within 2-3 seconds, the bird was going crazy. It was like up (ascend) was sideways, bc my altitude left stick seemed to just send the P2 head-first sideways; a maneuver i could never replicate myself while flying in GPS mode. It was terrible and within a few seconds it had come down hard on the pavement maybe 150feet away. I didn't have time to react to try for switching to manual mode or turning off the transmitter for RTH. I realize these things could have saved me but it happened so fast :/ The question is, why did it crash? It's amazing but the P2 actually still flies okay, and the body isnt damaged at all really, the motors and LEDs work fine, etc. I took off multiple times and flew around my apartment in ATTI on Saturday. I absolutely cannot believe it still flies bc if you saw the destroyed Zenmuse and destroyed Hero4, you would never believe it can fly. So RC / transmitter issues are ruled out here. It must have been radio interference or satellite issues. But I have flown this location before, clearing my mind of radio issues? So therefore, satellite connection issue? I have heard of not having a really good lock and the GPS system being confused about Phantom 2 true position and this resulting in crashes and flyaways? I calibrated in the middle of the park field but there was a suspicious manhole about 10 feet from me. No I did not read the manhole cover or anything, but I did not calibrate on top of it, like I said, 10 feet away. Ughhhhh I dunno what do think about everything but this crash is at least $1k in damages. I probably won't have the confidence to fly it in any serious fashion again though. Thoughts? Thanks!!! PS http://imgur.com/vW0Irwh this ******* has a huge antenna on his house, its about 500 feet away. Any concern??