Kramer goes down when he gets spit on by Keith Hernandez. Jerry has a different theory, however.

Seinfeld Season 3 Episode 17 Quotes

Jerry: I'm Vandelay Industries?
George: Right.
Jerry: And what is that?
George: You're in latex.
Jerry: Latex? And what do I do with latex?
George: You manufacture it.

(in a condescending tone) And you want to be my latex salesman?