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Walk/Don't Walk

While listening to a rerun of the sitcom Just Shoot Me in the background, I heard the statement: "If you can walk, you don't walk away from the show."

Something seems wrong with this conditional of "p implies q." Wearing my math hat, I created the countrapositive for the original statement: "If you do walk away from the show, you cannot walk." Something seems wrong here...the original statement sounds legitimate, but the second sounds impossible?

What am I missing? Aren't a statement and its countrapositive always equivalent in truth value? Perhaps, but does that mean their real-world implications are equivalent?

Guess I will just walk away from the show.