Best April Fools Day Prank?

[Smithb9841]

I turned the sensitivity and timers way down on the motion sensors that control the lights in the old maintenance managers office at work. So the lights would constantly turn off and he would have to get up from his desk for the motion sensor to read his movement. I told his electrician about it so when he went to look, he told him it was a newer energy efficient sensor and that it couldn’t be adjusted.

i was in the next office over and would hear him cussing and getting up multiple times throughout the day for weeks before I finally told him about it. I had to wait for him to
Come into work in a good mood because I knew he would lose his shit and not talk to me for weeks if I told him on a normal day