It sure was a weird finish in Colorado. Late last night, Ken Buck led Michael Bennet in Colorado by 400 votes or so. At least, I think that was the case. After holding a small lead all night, Buck suddenly surged about the time Boulder County results were coming in. According to the video here, there may have been a transposition error by the AP or by the Colorado Secretary of State.
Later the AP asserted there was no error. Which meant that the Colorado Senate race was headed for an automatic recount.
But then this morning, Bennet was declared the winner. The remaining votes to be counted, it seems, are from precincts where he was already running strong.