Whats the psychiatric explanation for laughter ?

I was going to put this on the thread "mental illness is to complex" to point out how they don't have a clue.

Why does the thought of doing an "upper decker" in the bathroom at a NAMI: National Alliance on Mental Illness office bathroom make me laugh right now ?

Whats the mechanism of action in my brain that causes laughter ??? Psych can't explain this.

First we have to ask : Whats an upper decker ?

What does Upper Decker Mean?

Maybe your thinking when a home run ball in baseball reaches a level of the stadium above the first section of box seats in the outfield, it is called an upper decker.

Try definition # 2

1. Taking a dump in the "tank" portion of a toilet, thereby causing a major malfunction of the bowl cleaning process.

2. When you take the top off a toilet and poo in it so and replace it so when the next victim flushe's instead of becoming clean it fill's up with poo..

This dude pissed me off so I gave him the ol' upper decker.

Whats going on in my brain , why does the idea of doing an upper decker in the bathroon at a NAMI office make me laugh ?

Maybe because any foul thing you can do to them is less foul than the things they have played a part in doing to others