So, I was flying last night at the beach and I flew through a "natural bridge" created by years of errosion. Going from beach to ocean side was no problem, but coming back thru from ocean side my P4 stopped - like there was an obstruction- so I grabbed it while it was hovering, with no hands on the controller, and walked it thru the hole/tunnel in the cliff. As I was waalking through holding onto it, it went to full speed and maxxed out !!! Any ides why? Good thing i had a grip or it would have gone straight up to the ceiling :0)