Hello, Let me start by saying I've been a lurker on this site since I purchased my P3 and really enjoy the insightful information from all of you, thank you! Now to the message I never wanted to type. Basically I was flying my P3P in a P-GPS mode and had been flying it prior to the flight and had no issues. Shortly after take-off on this flight it basically had a mind of its own. The motors were revving at such a high tone I've never heard before and don't feel I could make them rev this high if I wanted to. It flew away from me and was going as fast as possible (on the logs I see speeds of 51 mph.) It was non responsive to any movements on the remote. I couldn't bring it back but I was able to eventually get it to turn away from where it was headed. It was flying in a massive circle and the battery burnt down in a matter of seconds and it put itself RTH but wasn't RTH-ing. As it was flying in a circle the P3 would spin itself. It was bizarre. The drone eventually moved into whatever the mode is called when it force lands and began dropping elevation as it continued to fly uncontrollably. Unfortunately the drone flew itself into a large dead tree overhanging the Colorado River and was never seen again. I'll post logs and hopefully do it right. Please inform me of anything you guys see that may have caused this. HealthyDrones.com - Innovative flight data analysis that matters Phantom Log Viewer - PhantomHelp.com If I need to post something different, please let me know. Thanks in advance!