Skipping medicine!
Santa went to a doctor to get some medicine, as he was not feeling well.
"This is pretty strong stuff," said the doctor, "So take some first day, then skip a day, take some again and then skip another day and so on."
A few months after the doctor met Santa’s wife and asked how he was.
"Oh, he is in a coma," she told him.
"So the medicine I prescribed to him did him no good?" asked the doctor.
"Oh, the medicine was all right," she replied. "It was all that skipping that has almost killed him."