Instead of starting another thread, i'm gonna try to hijack this one and say we all share April Fools pranks and stories, as well as just posting to any good ones you might of found on the interwebs.
Here's one of my favorites, that comes off as mean spirited if you weren't really there for it.
I was working a retail job a few years back and two of my managers were homosexual. I was working the mid-shift that day, Archie (one of the managers) was working the early shift, and as usual we were talking trash about Andy (the store manager, the 'big' boss) because he didn't know how to do anything right. I decided we should prank him, and together we came up with a good idea. I was going to "come out of the closet" to Andy when he came in, just to mess with him.
A few hours later he comes in, and the store still wasn't busy (this is why we talk trash about him, he puts 3 managers on the schedule and theres no one in the store. nonsense) so i was in the back pretending to sulk a little. Andy notices i'm not acting myself and asks Archie if somethings wrong, and he just tells him i've been acting funny all day. Andy comes over and asks if theres anything i wanna talk about, and i say "yeah actually but.. can we talk in the back, in private?"
So into the stockroom we go and i come up with this whole lil speech about how him being the way he is and how open he is with his sexuality gave me the courage to come out and how he was the first person i wanted to tell. His eyes welled up and he gave me the biggest hug. We walk back out to the sales floor and Andy, in his usual 'diva' attitude comes up to Archie who has been playing dumb this whole time and shouts "Archie, get ready honey cuz Mike has something feice he wants to tell you!"
Thats when i turn from facing Archie to Andy and shout (in unison with Archie) APRIL FOOLS! Andy got pretty red in the face but he laughed it off.. eventually lol