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

 824

0  

Paint a bar of soap completely with clear nail polish so it won't suds up.

 785

1  

Install the Blue Screen of Death screen-saver on someone's computer.

 864

3  

Hide all of the desktop icons on someone's computer and replace the monitor's wallpaper with a screen-shot of their desktop.

 936

0  

Fill someone's hair-dryer with baby powder.

 784

1