I can also attest that even if you fly electric, props are also dangerous as hell!!! I was checking a geared 600 motor with a 12x8 folding prop. Just got a new hitec eclipse transmitter. It was on and so was the rx system. On the TX, there is a throttle cut button which if pressed, no throttle signal is given to the RX. Had the plane in front of me and the TX was off to the left. I just bumped the throttle stick,
only about a few tics. The prop started and cut my forearm between the elbow and wrist. I had 3 gashes from the prop bite and blood was spurting out like Old Faithful!!!!. Luckily, I didn't cut any tendons and even missed the main vein. But still, I required stitches to close wound. I learned two things...RTFM before using and always make sure TX doesn't have a chance to be bumped when checking motors.
The blood stains on the shop floor act as a reminder to me to not do any more stupid moves!!!

Dave...