Ransom Donkey
At work I have various collegues who believe in pulling practical jokes on each other.
One of the current one is that one of staff members toy donkey has been kidnapped during the early hours of the morning an a mysterious ransom note was placed as her desktop wallpaper and her home page on her webbrowser.
Highly ammusing none the less when she was trying to explain to various other colleagues that her donkey was kidnapped.