On my way to work Dec. 28, temperature at 33, no precip overnight, I hit a patch of totally invisible black ice and went down.
I was not as lucky. I bit through my upper lip, requiring seven stitches outside and five inside, and chipped a tooth. Also banged my knee pretty hard; still hurts.
Bike is OK. I cleaned up some scrapes and replaced the bar tape. I've been dying to get back on it, but my wife, an emergency nurse, made me promise not to commute while she was out of the country. She gets back Saturday.