The Big Bang Theory2007

Sheldon Cooper:
Hello, Penny.

Penny:
Hello, Sheldon.

Sheldon Cooper:
You're in my spot.

Penny:
Are you planning on sitting here?

Sheldon Cooper:
No, I'm going to the comic book store.

Penny:
Then, what difference does it make?

Sheldon Cooper:
What difference does it make?

Leonard Hofstadter:
Here we go.

Sheldon Cooper:
That is my spot, in an ever-changing world, it is a single point of consistency. If my life were expressed as a function on a four dimensional Cartesian coordinate system, that spot, at the moment I first sat on it, would be 0-0-0-0.

Penny:
[blank stare] What?

Leonard Hofstadter:
Don't sit in his spot.

Penny:
Fine.

[changes spots]

Penny:
Happy?

Sheldon Cooper:
I'm not unhappy.

[Sheldon exits]

Penny:
Boy, I love him, but he is one serious wackadoodle.