wow Dave that's a nasty accident. Sad Barge your work friend who lost her husband.
Yes grinders and routers must cause the most damage out of power tools. Jarrod almost lost a thumb using a hand held router about 3-4 months ago.
So be careful everyone.
I've seen a hand held rotary tool with stone bit not clamped in the chuck go through a glass and end up about 6 metres away travelling along the workbench, that was an eye opener ! Luckily we only lost a glass of champagne !