Hi,
I came across this nasty accident yesterday on another forum and today he posted photos of it. He was changing a drill bit and accidentally stood on the switch. If you have one (like I do) it's something to keep in mind as it only takes a second to loose concentration. I am planning on putting a cover on mine as my son had a near miss the other week.
Here is the link to it.
http://bbs.homeshopmachinist.net/showthread.php?p=733603&posted=1
Dave