I was up about 300 feet, 8 sats, thought all was good. Taking a picture of an alien crop circle (launch pad) and it happened. Just took off, not responding to control input, hit failsafe, nothing happening. As it headed towards wooded area to be followed by housing, I CSC it and the motors shut off. It was dropping like a rock from 300 feet, CSC'd again and the motors started and righted itself but would not take power. So down, down, down it came landing in 2 feet of fresh powder snow. Ran over to where there was a perfect X print and started diigging. Pulled it out with zero damage but covered with snow so I wont try starting it till I'm sure its dry. So what caused it? Maybe because its ten degrees out, I don't know. Why did it take the CSC command and not stick input. I did stop at atti on my way to failsafe but it didn't seem to make a difference in the way it was speeding away and at that point panic sets in so CSC it was. All in all I feel lucky but not as lucky as never having a fly away! Attached is the last picture taken.