Practical jokes

I'm still in a fairly mellow mood - holiday hangover. One of my New Year resolutions is to try and reduce stress this year, because I still have nasty dreams from the many years I worked in broadcasting (guess it's a form of post traumatic stress disorder). One of the ways we used to try and cope was via practical jokes. For instance, back in the days when radio stations used suspended microphones, a technician friend once crawled into the ceiling space above the news reading booth of the Invercargill station, and slowly pulled up the microphone during the bulletin. The suffering newsreader wound up standing on his desk to try and keep up. In Christchurch, someone crept into the news booth and set alight to the reader's papers during a bulletin. National TV newsreader Dougall Stevenson used to read the news with a suit jacket and tie on top, but only gardening shorts below, until one day the studio cameraman pulled back to reveal his legs in all their glory. At Radio NZ in Christchurch in the mid-1980s, there used to be an annual water fight among staff. It started off fairly innocently with water pistols, but like all wars, escalated over the years. One year, someone (Ken Ellis or James Daniel springs to mind) enlisted the services of the Christchurch fire brigade and their hoses. That was the year I sat at my desk in the newsroom in just swimming togs and a tie (the tie was for formality's sake,) to some very odd looks. But management finally issued a stern "desist" notice when someone unleashed the internal fire hoses, and the water seepage put 3ZM off the air.
I would love to hear other coping mechanisms if you have some anecdotes.