Change the coffee in the office coffee maker to decaf.

 998

1  

Fill someone's hair-dryer with baby powder.

 485

1  

Put tape over the optical sensor of someone's mouse.

 590

1  

April doesn't fool Chuck Norris, Chuck Norris fools April.

 539

0  

Find a sleeping person, fill their hand with shaving cream and then tickle their nose.

 526

0