[kermitology]

I think I mentioned one where I put a piece of tape over the ethernet connection of one of my coworkers.. well there's a better use of that one.

If your victim has a phone in their office, take out the connection between the base and the handset and put the piece of tape over that connection. When the phone rings, they'll pick it up, it will answer, but you can't hear or talk. Unless you use speakerphone.

My victim gave up and used my phone.