April Fools

To date, I have had only one good April Fool's day prank. At my former company, we had a large long, 4 story building. The morning of, my partner in crime and I put up signs on all the doors (over a dozen) that said (paraphrased) "Roof Spraying Work Today, please park away from building to avoid overspray". As we watched from our office window (the building had a curve to it so we could see 6 of the doors), people would walk up to the door, pause, and then turn around and go back to move their cars. About a quarter to a third of the people moved their cars to the far side of the lot.