Sheldon and Leonard are having a not-so-important, yet funny, conversation about the height of stairs.
(Season 1, Episode 1: Pilot)
Sheldon: Are you still mad about the sperm bank?
Sheldon: You want to hear an interesting thing about stairs?
Leonard: Not really.
Sheldon: If the height of a single step is off by as little as two millimeters, most people will trip.
Leonard: I don’t care. Two millimeters? That doesn’t seem right.
Sheldon: No, it’s true, I did a series of experiments when I was twelve. My father broke his clavicle.
Leonard: Is that why they sent you to boarding school?
Sheldon: No, that was the result of my work with lasers.
sperm bank = a place in which human sperm is stored in order to be used by doctors to try to help women become pregnant
to trip = to lose your balance after knocking your foot against something when you are walking or running
clavicle = the technical word for the collarbone (= the bone between the shoulder and neck)
boarding school = a school where students live and study
(definitions taken from the Cambridge Dictionary)
Other funny scenes from Big Bang Theory:
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