(Writer's note: I don't really directly say if Alex has grown, or if Justin has shrunk, so just go on what you'd think happens more)
He looked as tall as you were, but that had to be impossible. Alex had never been as tall as you, ever. He'd been a decently sized kid, but certainly not as big as you.
Seeing you slowing down, he stopped, still annoyed, "What's keeping you already? Did you forget something?"
"Alex..." you say, scratching your head, 'When did you get to the same height as me?"
He looked honestly surprised, "Did somebody hit you on the head while you were asleep? I've been as tall as you for awhile."
"...R-right, tall as me." You say, following Alex, still feeling like something isn't right.
Alex shouldn't be as tall as you, he just shouldn't! Even so, as you and him walk along to the snack bar, something seems to get your attention.