I'm easily on 150 flights with zero crashes, and I still continue to discover new information about the Phantom that is worth sharing. I know with motor cut-off set to INTELLIGENT, the motors should not shut off in flight. They should only shut off when it is stable and on the ground. Yet, I have always been chicken to bring my throttle to zero and test it. Today I did that, unintentionally, while I was descending quickly and indeed, they did not shut off! So, if you need to descend quickly, feel free to bring that throttle all the way down. But, I did learn something very important when doing this. You have no other control, so forget about avoiding a tree! You cannot control side to side or forward and back movement. At first I thought something was wrong and I was going to experience my first crash, but as soon as I brought up the throttle slightly, I had full control again. I then tested this a couple times. So, feel free to bring them down quickly, but as soon as you need control again, just give it a little power.