Glad you weren't hurt, Made me remember my first Oh Shooot moment with a power tool.
I was working with my grandfather drilling some holes in old 4x4s he was using as a base for a screen house. The ends had been cut for a half lap joint and were laying on the ground to drill the holes. The drill we were using was an old black and decker monster. the handle was about 10" long and there was a 12" piece of 1" pipe screwed into the top of the drill opposite the handle, along with this was a big D handle on the back of the drill. The drill had two speeds, slow and off. The trouble was that with a drill that size slow meant that it had similir torque to a medium sized tractor. Now these old drills had a little button on the handle that was a trigger lock. If you pushed the button in when the trigger was depressed the drill stayed on. The only way to turn it off was to squeeze the trigger hard allowing the button to pop back out. The button was located right where the top of your hand rested when squeezing the trigger. More often than not it would get pressed when using the drill and you would have to give the trigger a few jerks to stop the drill after each hole. Now I was about 12 or so and not all that big yet. After successfully drilling two or three holes under supervision Gramps decided I could do the rest on my own and went into the house for something. Well the next hole had a knot or something in the wood that made a the bit catch. This caused the drill itself to start spinning since the little button was, as usual, depressed. Being only 12 and around 100 lbs I had to really hold on to work the drill, so when the drill started spinning it took me along for the ride. There I was hopping in circles trying not to get beaten to death by the drill. This caused the cord to start winding around my legs further securing me to the out of control drill but proving to be my salvation. After about 8 or 10 revolutions the cord came tight and pulled out of the wall socket thus killing power to the drill. I quickly started hopping in the opposite direction to unwind myself so I could get everything back in order before gramps came back out. Funny thing is thinking back on it now gramps managed to stay inside just long enough for me to get everything situated and finish drilling the hole.