Awful co-worker who tried to throw me under the bus.
I put cello tape over the bottom of their mouse so the laser didn’t work, and sat back and watched as they mucked around with it for ages. Then said nothing as they called IT, waited 2 hours for them to arrive, only to be told “you got cellotape stuck on the mouse, see?”
I love this question and want to see how petty other people are, so same question