We were so amped up about "Top Gun" Day and "Ghostbusters" turning 30 that we almost forgot to celebrate another classic '80s film celebrating an anniversary: "The Karate Kid."Having premiered 30 years ago in June, "The Karate Kid" remains and American pop culture mainstay, with Miyagi's wise lessons ("Wax on, wax off"), the "crane" kick, and the Cobra Kai ("No mercy!").So trim your bonsai tree, crush some house flies with your chopsticks and fire up Bananarama's "Cruel Summer" and relive the movie that made you and your friends want to learn karate, despite your mother's objections.