Laundromat burns down after displaying missionary garments
Hard to prove
This is a great missionary legend. The story is that two missionaries are doing their laundry at a laundromat and, for some reason, leave for a few minutes. When they return they see that the laundromat has displayed their garments in the window with some sort of rude sign (like Mormon monkey suit or magical underwear). The missionaries wipe their feet at the doorway (shaking the dust from their feet) and leave. The next day they return to the laudromat to find that it has burned to the ground.