So it's never done this before. I did just move the FPV transmitter inside the phantom, but I have been running it outside the phantom for a week now. I made sure not to allow any contact on the inside. After installing I took it outside for a test flight. Transmitter on, phantom on, green lights flash. 1.) GPS take off from parking lot = quick flip upside down and full gas into the ground... 1.1 (check to make sure props are on right arms... They are self tightening.... but yes they are on the right arms.) 2.) Tried once more same thing. 3.) Moved to grass. Same thing 4.) Unplugged battery "Restart" takes off fine... 5.) One more take off, and it works fine... Has anyone else had this happen?