Harmless Pranks During a Downsizing?

Jailbrekr asks: "I am the I/T manager for a large horticultural firm, and will soon be a victim of aggressive downsizing. The downsizing is so aggressive that my position, the only I/T related position, will be eliminated. Being the lone gun has meant that I have held a significant amount of power within this organization, and until now, have refrained from abusing it. Seeing as I will soon be out of work, I have begun my (tongue in cheek) 'reign of terror'. To start, this week is 'Gummi Bear Week', where everyones wallpapers now have a (worksafe) gummi bear theme.What I need are suggestions. What can I possibly do that is work safe, humorous, and not something which will get me fired prematurely? During the dot bust, when downsizing was all the rage, what did the tech geeks do to abuse their power, and keep the workforce entertained during those especially stressful periods?"