Sheldon:
Do you want to hear an interesting thing about stairs?
Leonard:
Not really.
Sheldon:
[
going on anyway] If the height of a single step is off by as little as two millimeters, most people will trip.
Leonard:
I don't care.
[
thinks about it]
Leonard:
Two milli - that doesn't seem right.
Sheldon:
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.
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