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)