It happened very quickly, and thus it is hard for me to say how it lifted. I gather it did lift on its normal arc, as when I do a mirror lockup test on it seems to operate correctly, using its normal arc. I see nothing wrong when I do the test, and if the linkage had been damaged or dislodged, I imagine the MLU would not work correctly.
The main mirror pivots are fixed, no complex mirror motion when rising, so unless the pivots are broken you will get only a simple arc. You could see if you had a broken pivot. I think you're fine.
As for CGW, you'll get used to him eventually. Probably. Maybe.
All you need to do to remove dust or hairs from a mirror is make a brush out of a few sheets of lens cleaning tissues torn in half, and rolled up together to make the torn ends into the brush and gently brush the mirror with the torn ends of it.
I've only had to clean a mirror once, and I used one of those Zeiss lens wipes, which are moistened with their cleaning fluid. I tore it in half and wrapped it around a q-tip. After gently rubbing for a few seconds, it dries up quickly, and anything left behind will usually easily blow away. These things are handy for all things photographic, (and my wife pinches them to clean her glasses), and I keep some in my camera bag all the time. Once, somebody standing beside me popped open a can of Coke and a bit sprayed on my UV filter. Grabbed one of those little wipes, and that sugary stuff was gone in no time.
Unfortunately, on any website, you will get the occasional person who is habitually rude. Ignore them.
lxdude: I appreciate your reassurance, as I enjoy using my F3, and would not want anything to happen to it. The movement of the mirror remains something of a mystery/blur to me. Again, it happened quickly...
I sold my two FEs, and have an F4S on the way. I enjoyed the FEs, but I like the focus confirmation and higher frame rate of the F4S. I have tried a number of Nikon bodies, and my F3P is currently my favorite. I am very much looking forward to the F4S.