What I always thought was weird about that scene, after I found out, was that they almost
rewrote it enough to cover it perfectly.
Checkov: I was never that young.
Kirk: No. You were younger.
Kirk: Keep things together until I get back.
Scotty: I always do.
But, then, they didn't...
Spock: But I do have a theory.
Kirk: I thought you might.