Earlier this year I found the imprint of a slice of chocolate torte, along with some whipped cream, on the window valance in a Westin.

A previous guest must have accidentally launched the content of his dessert plate, as if playing tiddlywinks, over his own head. Or else he might have flung his torte, like one of the Three Stooges, at a tall person (who ducked).

In any case, it blended in with the pattern on the curtains, so the housekeeper missed it. (I went back and let the front desk know, just so they wouldn't assume I was the dessert launcher. The hotel staff were nice about it and even swapped out the valance.)