Page yourself over the intercom. Don't disguise your voice.
Develop an unnatural fear of staplers.
Reply to everything someone says with, "That's what you think."
Don't use any punctuation.
As often as possible, skip rather than walk.
Specify that your drive-through order is "to go."
Find out where your boss shops and buy exactly the same outfits. Wear them one day after your boss does. This is especially effective if your boss is of the opposite gender.
Send email to the rest of the company to tell them what you're doing. For example, "If anyone needs me, I'll be in the bathroom, in stall 3."
Have your coworkers address you by your wrestling name, Rock Hard.
When leaving the zoo, start running towards the parking lot yelling, "Run for your lives, they're loose!"