Sheldon Cooper: If you want to save money, why don’t you land the booster rockets instead of letting them drop in the ocean?

Dr. Hodges (NASA): That’s a cute idea, but, uh, it’s not technically possible.

Sheldon Cooper: Why not?

Dr. Hodges (NASA): Well, it’s hard to explain. The math is pretty complicated.

Sheldon Cooper: Perhaps I could help you with it.

Dr. Hodges (NASA): Well, I bet you could.

From Young Sheldon – Season 1 Episode 6: ‘A Patch, a Modem, and a Zantac’ (1×06)