Years back when I was still on the cord, I had one of them with handles, with a big hog bit just for windows and doors. I'd wall a whole room out, then grab the big router and cut out everything at once.
I set it down, threw a piece of scrap, it bounced and hit the router right on the switch, thing stood up on the bit and started running around the room, it was quite chit show, I did not get the 6 way in time, router grabbed the cord, and wrapped itself up in the cord, still trying to dancing all over. Totally trashed the cord. It was rather funny to watch.