That is hilarious. I love David's imagination. "Too busy researching wasps" made me literally lol.

I've done a couple of silly bits and pieces. I once went around sticking post-it notes on the bottom of everyone's mice which utterly blagged a fair few people.

A colleague of mine who used to sit next to me (she's now left - I wonder why!) had a print out of a photo of her husband and son together and and another one with her son Photoshopped as Harry Potter. I photoshopped in the face of another colleague of ours into the photos - he was both the father and son! Everyone, and I mean everyone in the office came over to look at my handiwork, even the totally serious types from other teams who I never interact with apart from the usual "good morning how are you" routine that other office workers can relate to. I only meant it to be between a couple of us and at first I was like "trout, I'm going to get absolutely bollocked for this" and it was really awkward but they all thought it was brilliant, even the managers. Go figure. The woman in question wasn't quite so amused and ripped them up!

Finally, football pranks. Me and a colleague who supports United took pleasure in telling each other lies about what each other's team has done "United have put in a bid for Tom Huddlestone!" for example. I know if you are one of the 97% of EoFFers who avoids the football thread you won't get that. Either way, it's now responded with "You liar" and a quick trip to the BBC Sport website. So I edited the actual source code of the BBC Sport website, made a fake news story about the Manchester United manager being sacked. I typed in the BBC Sport URL into the address bar but I didn't hit enter, so it looked like I was actually on that page. Called him over, and it completely and utterly had him. The rage when he found out what I'd done was hilarious... until he insisted we get an Arsenal supporting colleague with a fake story about their manager too, and I was all too happy to oblige.