I can't say that I have "experience", that's just what I recall from having the nitro heli. I took it outside and spun it up, (after checking the blade tracking and balancing) got it light on the skids and everything seemed o.k. I then took it up 3 or 4 feet got in in a soom what stable hover, then it just shot straight up 2 or 3 feet and straight back down. I have no idea what caused this but it got my attention. Any ideas on what caused this. Thanks in advance for any comments or ideas.