This is from my Uncle George, whos retired USAF. (US Air Force)

Santa Claus, like all pilots, gets regular visits from the Federal Aviation
Administration, and it was shortly before Christmas when the FAA
examiner arrived.

In preparation, Santa had the elves wash the sled and bathe all the
reindeer. Santa got his logbook out and made sure all his paperwork
was in order.

The examiner walked slowly around the sled. He check the reindeer harnesses,
the landing gear, and Rudolfs nose. He painstakingly reviewed Santas
weight and balance calculations for sleds enormous payload.

Finally, they were ready for the checkride. Santa got in and fastened
his seatbelt and shoulder harness and checked the compass. Then the
examiner hopped in carrying, to Santas surprise, a shotgun.

Whats that for? asked Santa incredulously.

The examiner winked and said, Im not supposed to tell you this, but
youre gonna lose an engine on takeoff.