Detail-stripped my 1911 today, right down to the sear.
As i was disassembling the slide, i had a brain fart, and after carefully removing the rear lockplate while holding the firing pin down, i released the firing pin, and pushed the firing pin block up (Kimber).
Result, the firing pin ejected forcibly, bouncing off my forehead and across the room.
Fortunately, my years of training as an automotive mechanic have honed my ninja reflexes so that any object which strikes me and vacates the immediate area will be visually tracked to it's final resting place regardless of the dumbfounded look of surprise on my face, thus averting disaster. The spring propelling said projectile, however, was not so well tracked. Fortunately, as i stood up to retrieve the firing pin, the spring fell from it's position on my lap, and the gun is now clean, shiny, and fully functional. :-D