Quoted from The Big Bang Theory:
Penny: Yeah, I do like the one where Lois Lane falls from the helicopter and Superman swooshes down and catches her, which one was that?
Leonard, Sheldon and Howard together: One. (Raj raises one finger).
Sheldon: You realise that scene was rife with scientific inaccuracy.
Penny: Yes, I know, men can’t fly.
Sheldon: Oh no, let’s assume that they can. Lois Lane is falling, accelerating at an initial rate of 32 feet per second per second. Superman swoops down to save her by reaching out two arms of steel. Miss Lane, who is now travelling at approximately 120 miles per hour, hits them, and is immediately sliced into three equal pieces.
Leonard: Unless, Superman matches her speed and decelerates.
Sheldon: In what space, sir, in what space? She’s two feet above the ground. Frankly, if he really loved her, he’d let her hit the pavement. It would be a more merciful death.
Is Sheldon's argument correct?