hahahaha This was an article I happened to come across on the MyMiami site:

"Beware of black ice
Posted: 2/10/2004
Cold nights and slightly warmer days are the right conditions for black ice to form, says Mike Coons, director of Miami's environmental health and safety office. He and others have come across several nearly undetectable slippery spots around campus. Miami grounds crews are working to eliminate the ice, but Coons warns walkers to step with caution."

Yeah, too bad I didn't read that yesterday. haha Serves me right.