yes... i've had electrics go wild on me, too... one time i was handling my WM CWCub that has a brushless on it and i had my right hand holding it through the prop arc. naturally the throttle was off but somehow it was nudged and the prop started to cut my wrist. i couldn't let go since there were people around me so i held on and twisted my wrist so as not to have the prop hit me too hard until i could shut off the throttle. prop cut at my wrist but since it was no where near full throttle it was only deep scratching rather than cutting. had the throttle been nudged halfway, i'd be in much worse shape. i recommend that before you handle your electrics, put on the throttle lock. could save you lots of pain.