At my job, there is one co-worker that knows everything, has done everything or knows someone who has. You know the kind I'm talking about, has to "one up" you on everything...no private conversations allowed without him. There are probably 70+ people that work there. Well....we set up the prank by saying we were going to dress up for Halloween, one of the managers even brought a sign-up sheet around for those who want to dress up...we all signed it, knowing full well NONE of us were going to dress up (plus I'm off on Mondays, he knew I wouldn't even be there and still kept asking me what I was dressing up as). People start showing up for work between 6-9am. Got the text a bit ago, he showed up at 6:30am in full vampire/zombie costume, complete with face paint. I can't wait to hear his reaction at being the only one in costume.