throwing things at the ceiling fan

[Breine]

A whole lot of rotten fruit and/or vegetables.

[Madame Adequate]

A rotton, fetid zombie limb.

Worldwide, apocalyptic hilarity ensues!

[Peter_20]

A cow.

[Little Blue]

If the surrounding environment is people, then a bird would probably do the trick. People generally don't like blood and intestines all over themselves. The feathers give an additional effect too, I guess.

Throw in bird flu and chaos can spread worldwide

[Drex]

Large spiders and snakes. Those that didn't get chopped into their component parts and splattered all over the people in the room would wreak their own havoc, and many people don't even like to touch dead spiders anyway.

Or rotten salmon (not gutted) for a different effect.

[Moon Rabbits]

Babies.

[Araciel]

bag o' pudding

[Hambone]

dog poo.

[escobert]

a brick.

[sephirothishere]

um...a jar of spaghetti sauce....

[Deborah]

Thumbtacks...

[Hambone]

Thumbtacks...

oww.

[blackmage_nuke]

A Table Fan

[evaile=B.mage]-[/evaile]

[Jessweeee♪]

Needles with the blood of patients with HIV.

[BardTard]

I once threw mashed patatoes into the ceiling fan. It was awesome!

SWEEEEEEEEET!!!

I'll say applesauce though (I know, lame) cus that's really messy and hard to clean up...