Hi all need some advice. I was on my 4th flight today and the bird kept going straight up. It would not respond to the controller so I turned off the controller to activate the fail safe mode. Fail safe mode worked but the bird descended fast on the last couple feet making for a rough landing which caused the bird to tip on its side before I could shut it down. Thankfully I have prop guards. So…I flew another flight with a new battery and everything worked without a problem. My question is should I recalibrate everything including the IMU or do you think it was just a fluke problem?