Practical jokes - your favourite?

[psycho_smurf]

Just wondering if anyone's had any great ones? My best was tipping half a bottle of oil under the front of someone's car on his driveway, then laughing as he spent hours trying to figure where the leak was coming from. (yes, he deserved it)

[Reaper]

I flushed an orange smoke flare at a public toilet at the beach once during a crowded day. It went into the septic tank and orange smoke came out of all of the toilets and people quickly leaving with strange alarmed looks on their faces. Was many years ago.

Reaper

[NORTI]

screen shot the desktop on a PC at work that was left unlocked, made the pic the desktop background & moved all the icons off the screen..... hilariousness when they are double clicking 'icons' and nothing happens

[FstStig]

hahahhahhaha ^^^ Did something similar to my mate, but created a folder on it first called "My Gay Porn Vids" was priceless seeing him turn black and blue yelling at me asking what i did.

[Trayner]

screen shot the desktop on a PC at work that was left unlocked, made the pic the desktop background & moved all the icons off the screen..... hilariousness when they are double clicking 'icons' and nothing happens

hahahhahhaha ^^^ Did something similar to my mate, but created a folder on it first called "My Gay Porn Vids" was priceless seeing him turn black and blue yelling at me asking what i did.

yeh ive done a similar thing too lol , in I.T when i was at school.