I want to mess with my friend

[bluepilot]

Does he own any expensive electronics?

If he does, by a broken version from eBay (one being sold cheaply just for parts because it is broken). Replace said electronic item with the one from eBay when he is out of the room. When he returns, smash it in front of him. Before he kills you, tell him what you did.

BTW this is pretty evil and I cannot be held responsible for any damage you may incur

 

[Eisenfaust]

Does he own any expensive electronics?

If he does, by a broken version from eBay (one being sold cheaply just for parts because it is broken). Replace said electronic item with the one from eBay when he is out of the room. When he returns, smash it in front of him. Before he kills you, tell him what you did.

BTW this is pretty evil and I cannot be held responsible for any damage you may incur

OR buy the broken version and switch it out, then when he gets pissed and leaves, switch it back to the proper one

Also, record ghost noises onto a tape recorder, connect to a radio broadcaster, tape under his car/bed/near other radios. set broadcast frequency to a popular station, press play...

he'll be hearing ghost noises FOREVER! drive him nuts

 

[gee666]

if passed out drunk insert a condom in his pants then next day say "what happend to you dude?" "last we saw you went off with..."

the other ine is mash a bannana and place in pants he will wake up thinking he shit himself

 

[Dags90]

Act really, really nice and super interested in him for a while. You can mess with him while not being a jerk at all.

 

[Daverson]

While he's not looking, write messages in a foreign language on his possessions, in one of those security marker pens. For his next birthday get him a security marker pen and one of those lights to reveal the messages =p

Replace his desktop background with a screenshot of his desktop, then delete all his icons =p (bonus points if you have a window with a... shall we say "special"... website there too ^^)

 

[Ren3004]

Pretend you never existed. Cut off all contact with him. Turn your phone off, delete your Facebook/Twitter/E-mail accounts. Pay everyone you know $100 dollars to deny your existence. He'll believe he's crazy.

Alternatively, leave little threatening notes around his house.

 

[twistedmic]

When you're around him, occasionally muter something random or creepy under your breath, just loud enough for him to hear it. When he asks what you said, deny speaking. Also move things around, but just off to the side of where it was originally.
Or, go to this site http://www.comedycorner.org/50.html. It's a list of things to do to freak out your roommate, some of which can doubtlessly be converted to messing with your friend.

 

[balladofangels85]

Play Rebecca Black's Friday for him. Then trick him into hearing it every friday

 

[Lillicus]

Pretend you never existed. Cut off all contact with him. Turn your phone off, delete your Facebook/Twitter/E-mail accounts. Pay everyone you know $100 dollars to deny your existence. He'll believe he's crazy.

AWESOME.

Oh, and also, mail him an empty package every so often.