He's been spacey ever since the accident that was responsible for his "sleigh
name" Comet. It was at the end of the run on the very first Christmas sleigh
delivery. At that time, Comet was leading the team through a dark and foggy
He suddenly thought he spied the big Lighthouse light on the tip of the
North Pole, the one they still use to guide the sleigh team home. Unfortunately
that was in the days before radar and meteorological forecasts.
Yep, it was a real comet speeding through the edge of Earth's atmosphere,
and a disaster was narrowly avoided after Comet head butted it out of orbit
and saved the team. He became a hero, but he's still seeing stars, even
in the daylight!