Well, I found out one thing not to do today. I've only had my "Vision" for a few days. Snowing heavily outside. No chance to try it out, so, I thought I would do some double duty testing today. I figured I would run the battery down for recharging before I head to the warmer south next week, and I thought this would give it a chance to show any dreaded battery disconnect error. So, I started the motors, but then I figured why run the controller when I wasn't going to control anything, so I shut it off. Several minutes later, I entered the room just in time to see it zoom to the ceiling and stick there. I had to run for a step ladder to get it down. Then it dawned on me. The connection was broken so it was attempting to get to 60 feet so that it could fly home. No damage, but a lesson learned.