April 1st Pranks

Did #3 in the car pranks to an unmarried co-worker years ago. Yeah, she was parked nose-out.
She was really burning up the next day when she came in and told us how she couldn't figure out why so many people were honking, smiling, and waving at her during her drive home. Then she got home and found out.
Made it even more satisfying a couple of weeks later when she drove home again only this time with a sign on the back of her car saying "IT'S A BOY!!!"