[COBOL2Java]

What’s up with the horse’s tail?

Bells on bobtails ring ("Jingle Bells")

Horses often have their tails "bobbed". This generally just means that the horse's tail is folded up and tied (like an old lady's bun - sort of) to make it look shorter and get it out of the way. If you put bells on a horse's bobbed tail, they will ring as the horse moves.

[Delta 21]

...and it makes your spirit bright.