I got a surprise today when my mini-quad went out of control on my desk. I had just installed new Clean Flight firmware on my Acro Naze32 and just set up the radio settings when I turned off the transmitter it set the quad into a run away and spun up to full speed in my hand, catching and gouging my fingers with the carbon fiber props! Things went from zero to a hundred real quick.
Lesson learned, always remove props when working on these. I didn’t remove them because what I was doing, it should not have been armed and didn’t have fail safe enabled, so it should not have taken off…but it did.