That has never happened to me, but that is why I use a foot switch when using power tools, take your foot off, it stops. Just in case. Mine ran me around $10 at HF.Determined to be more careful several holes later and I hit the very edge of the metal adjustable leg support and that jerked it to a screw holding it attached. So now I have this running router and it's bouncing all over the place without my ability to take a hand loose and hit the switch. Hence my post on using a deadman's switch which I should have been using and this whole incident could have been over far faster. Far faster being in reality just a few seconds sooner but far safer.