Change the coffee in the office coffee maker to decaf.
Write a message on an upside-down paper cup that alludes to something horrible being trapped under it. Leave it on a coworker's desk or in a conference room.
Put a "Please Use Other Door" sign on the entrance to your office building if it only has one entrance.
Pull on a coworker is to press ctrl+print screen on their workstation, then paste it into Paint, save the pic, and set it as the desktop background. Move all of their icons to the trash. When they get back to their desk, clicking won't accomplish anything!
Reaching the end of a job interview, the Human Resources Officer asked a young Engineer fresh out of MIT, "And what starting salary were you looking for?" The Engineer replies, "In the region of $125,000 a year, depending on the benefits package." The interviewer enquires, "Well, what would you say to a package of 5-weeks vacation, 14 paid holidays, full medical and dental, company matching retirement fund to 50% of salary, and a company car leased every 2 years say, a red Corvette?" The Engineer sits up straight and says, "Wow! Are you kidding?" And the interviewer replies, "Yeah, but you started it."
At Andersen Air Force Base, Guam, a man in civilian clothes approached an airman and requested a vehicle pass. The young airman, fresh out of technical training, asked to see his military ID, driver's license and his vehicle registration. Noticing the letters BG on the man's identification, the new airman asked, "What's BG stand for - Big Guy?" "No," the man replied, leaning over the counter. "Try Brigadier General."
Fill someone's hair-dryer with baby powder.
I just recently discovered that there is a national holiday named after Atheism. April FOOLS day. Like this story in the name of Jesus.
Take a squirt gun into the rest room stall next to someone and shoot little drops over the wall every couple of seconds while pretending to pee.
Q: Why did the can crusher quit his job? A: Because it was soda pressing.
Put tape over the optical sensor of someone's mouse.