Mom’s bad driving and correcting of peoples’ grammar are running jokes in JumpStart.
Okay, I’ve never heard the thing/think mistake myself, but it must happen or Robb Armstrong wouldn’t have made the joke. She’s correct, though. The other joke in the strip is that he’s not exaggerating; he does mean “literally,” not “figuratively.”
And to add my own note of grammatical pedantry, when you exaggerate, you’re speaking hyperbolically.