Next time try upgrading to a closed sleigh. Get out of the past and into the future of sleigh technology, today. Also, seat belts.
I could see how a one horse sleigh would still be worse.
Rule #1 for purchasing/operating a two-horse open sleigh: make sure the horses are pointing in the same direction!
Apparently, Biff bought it from Santa’s New and Gently Used Flying Sleigh lot.
It would probably be even worse with a two-thestral open sleigh!
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