A couple of years ago when I was working at a call center, I pulled a pretty funny April fools joke. I took a losing instant scratch lottery ticket and a razor blade, cut the top layer of the ticket and changed it into a $500 winner. Then I dropped it on the ground close to my bosses car. He found it, thought he found a $500 winner and was in a great mood all day until I told him and showed him the fake. He laughed and forgot about it, until two days later when his wife was doing laundry and FOUND IT...she took it to a store and tried to cash it in and the guy at the store called the police. She got arrested, he got a phone call....and I had to go talk to the judge and explain the whole joke, case dismissed...I got two for one with that joke. XD Didn't get fired either.