Cannot take it anymore!!!

[Darth Fett]

Another good one(practical joke)is to get some Fast Food ketchup packets,fold them in half,and place them under those little bumbs on the underside of a toilet seat.They're called Sqishies

[SpongeBuell]

that also works well with those snapper things that you throw on the ground to make a "pop" sound

[nos_slived]

Mini-mites. The plastic wrap over the toilet bowl is always fun if you don't have to clean up the mess. For good clean fun, I always like the one where you use a black pen(or silver Sharpie) to colour the rim of a dime, then bet somebody that they can't roll it from their forehead to their chin, without lifting it from the face.

[Darth Fett]

that also works well with those snapper things that you throw on the ground to make a "pop" sound

Yah,but those snapper thingys don't sqirt goo all over a persons pants.

[SpongeBuell]

maybe not, but snappers will probably scare the crap out of the person. Gets the job done quicker, I say