Hi, in order to better understand how the PV2 works, I have two questions. 1. I use the left down stick for 4-5 seconds when the PV2 is on the ground in order to turn it off. Is it possible for it to shut off in mid air if I were to hold hard down on left stick in order to descend quickly? How does it differentiate between the two situations? GPS? Feedback? 2. Lets say I start on a cliff and get my GPS lock, then fly the PV2 into the air, descend down the cliff and try to land at a point lower in elevation than I started. Will my PV2 function and land properly or will it think it is at below ground level and behave strangely/shut off in mid air? These are serious questions I have thought about while learning to fly my PV2. Thanks.