
Unless Superman
matches her speed and decelerates.
The Big Bang Theory Season 1, Episode 2

Superman doesn't sweat on Earth.
The Big Bang Theory Season 2, Episode 11

Superman is vulnerable to magic.
The Big Bang Theory Season 1, Episode 5

...do you wanna join us for Thai food
and a Superman movie marathon?
The Big Bang Theory Season 1, Episode 2

(HUMMING "SUPERMAN" THEME SONG)
The Big Bang Theory Season 2, Episode 21