Audio problem: In the external shot of "The Orient Express Restaurant" where Daniel's mum sits down and says, "Guess what? I'm going to be training as a manager.", her mouth isn't moving at all.
Audio problem: During the dance scene, when Ali and Daniel open the shower curtain prop and see the chicken running towards them, you hear Daniel say, "He's wild." But his lips do not match him saying that at all.
Audio problem: At the Country Club Dinner Dance, the band is playing the "Fascination Waltz", but the conductor's baton is at a faster tempo.
Audio problem: During the beach fight between Johnny and Daniel right at the time Daniel runs at Johnny and Johnny trips him for the FIRST TIME, you can see some of Johnny's friends holding Ali back as she yells, "Johnny, Stop It." But if you look close, it is easy to tell her lips aren't moving at that point.
Answer: Daniel's wounds came from fighting the Cobra Kai guys but he tells Miyagi that he was injured falling off of his bike. Miyagi sees through this and sarcastically says that he's lucky his hand wasn't hurt.
Damian Torres
I think he was also subtle letting him know he knew he didn't really fall off his bike because if he had, he would have at the very least scraped his hands...especially if he fell hard enough to cause that much damage to his face.
He was still trying to hide it. However, if you fall, you instinctively put out your hands, and they would be scraped up. Miyagi, older and experienced in life, knew better, but Daniel wasn't going to admit it outright.