From my “Murphy’s Law” desk calendar archives thanks to Aunt Evelyn, Uncle Pipey, and cousin Nancy:
Evan’s and Bjorn’s Law: No matter what goes wrong, there is always somebody who knew it would.
Goofy guy’s update to Evan’s and Bjorn’s Law: And today, whoever knew it was going to go wrong is blaming somebody else.
Jennings’ corollary on Murphy’s Law “The probability of the sandwich landing ‘jelly-side down” is directly proportional to the cost of the carpet”.