Adult Sheldon: The Clean Air Act required all new cars to be equipped with catalytic converters to combat air pollution. The first state to do this was California, which led Texans to say things like-
Peg: I hate California.
Adult Sheldon: And...
Peg: When will that place fall in the ocean? [hacks]
Adult Sheldon: While not everyone was happy about it, six years later, one particular Texan saw an opportunity to get rich quick.
George Jr.: Oh, man, I'm gonna get rich quick.

Adult Sheldon: I didn't realize until years later that my father was only asking questions about lightning and thunder to cheer me up. In fact, he would often pretend to be dumb just to make me feel better.

Adult Sheldon: My father didn't always get the credit he deserved. The advice he gave me actually worked out pretty well. Of course, I never told him.
George Sr.: Talked to Billy.
Missy: Why would you do that?
George Sr.: No, it was good.
Missy: Stay out of my life.
Adult Sheldon: He may not have been the world's greatest dad. But maybe we weren't the world's greatest kids.

Adult Sheldon: Visiting Tam's house for the first time was an emotional roller coaster.
For example, it's traditional in Vietnamese homes to have gruesome religious iconography near the entrance. I did not like that.
However, it's also customary to not wear shoes around the house for sanitary reasons. I did like that.
Interestingly, one of the main ingredients in Vietnamese cooking is an extremely pungent condiment known as fish sauce. I did not like that.
But before every meal, it's common for everyone to wash their hands and face. I did like that.
Forks are not customary in a Vietnamese household. I did not like that.
And instead of napkins, there was one towel for everyone to share at the table. Seriously, what are they thinking?

George Jr.: Should I be wearing all that?
Sheldon: I recommend it. Those rocks are filthy.
George Jr.: I'm good. God made dirt. Dirt don't hurt.

George Jr.: "Sell blood or non-vital organs."
George Sr.: Mm, give 'em your brain. You're not using it. [Sheldon laughs] I think that's the only time I've ever heard you laugh.
Sheldon: That's the only time you've ever been funny.

George Jr.: Tell me, Sheldon.
Sheldon: It occurred to me that a good way to generate a positive cash flow would be to curate popular songs and make them available in a digital form. Possibly on a small device that could also be used as a phone or even a camera.
George Jr.: Right. [mocking] A phone, camera, music machine. Get out of here.