I see no rational reason to distrust that crocodile, because I'm the one who let it into my bathroom.
Madness string 28812
We used to get powdered laundry detergent and add just enough water to make it sort of a paste where it would match the popcorn ceiling. Then you can proceed to paint and draw all over the ceiling, and it was invisible. Until someone brought a blacklight into the room. Shenanigans were then revealed.