"Wax on, wax off" is now "Jacket on, jacket off," and the original star of " The Karate Kid ," Ralph Macchio , wasn't so sure the reboot -- starring Jaden Smith and Jackie Chan -- was a good idea. "It's like mixed feelings. At first, I felt old. Number one, you feel old when they start remaking your stuff," Ralph, 48, told Access Hollywood at " The Karate Kid " premiere on Monday night in LA.