Plot hole: Daniel first needs Miyagi's signature (which Miyagi refuses) to enter the tournament. However the rest of the movie focuses on Daniel's signature needed to enter instead. Didn't Miyagi officially need to sign? How did it suddenly switch?
Trivia: When Daniel is persuading Myagi to use his college money to buy a store for selling Bonsai trees, he takes a wad of cash, smells it, and says, "Hmm. Looks like money.smells like money." Ralph Macchio has practically no sense of smell at all, so just for fun he always makes a point to smell something in every movie he does.
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