Your just in a lovely part of a forest with Test Tube and Cabby, just reading books because you three are basically nerds. Occasionally, Test Tube would say math jokes to lighten up the mood a little bit.

Test Tube: "Parallel lines have so much in common… it's a shame they'll never meet."

Cabby laughs while you chuckle

Cabby: "Oh, Test Tube! You can be funny sometimes!"

Test Tube: "Heh, I guess I am."