Reminds me of a prank we play on guys at the station -- during the summertime, we'll turn off their ceiling fan and put a little pile of flour on top of each blade. When they go to turn it on......everything in their room looks a lot like you in that picture.
I did something similar as an apprentice. My Tradesman was working on a fan heater....when he went for lunch, I sprayed the elements with CRC, and switched it on full heat.
When he came back to work on it he turned the power on, and he was showered with white smoke. Everyone laughed, except the one guy. :lol: