My button A is 'Fly Manual' -- I moved my thumb to what I thought was Button A - pressed and held down. When I got the Buzz - I realized I was on the power button. The Solo began a very slow climb, avoided the 150 year old pin oak, moved to the other side of the oak and began a very slow descent. It made a perfect landing. While this was happening I managed to power on the controller - it was just luck that the Solo avoided the oak. The controller did manage to reconnect with the Solo before it reached the ground. The very slow climb and descent gave enough time for this. My question is - what should I have done to regain control of the Solo?