When a hookup that was only intended to occur once, or occurred in an unexpected fashion, happens again at a later date. - Count it and one.

One who has a mania for music.

In the sport mooseball, this occurs when the ball hits an unacceptable spot on the body (such as the forearm or wrist) involuntarily but is still bounced and can be played. The score is reset to zero, but the momentum of the round continues.