Continuity mistake: Early in the movie, the kids go moto-surfing and the jeep they are riding in changes from having a door to not having a door.
Surf Ninjas (1993)
Directed by: Neal Israel
Starring: Rob Schneider, John Karlen, Ernie Reyes Jr., Ernie Reyes Sr., Nicolas Cowan
Revealing mistake: When the kid is playing the Game Gear and says 'I thought I was playing Shinobi. This isn't Shinobi. Where's Shinobi?', there is no game inserted in the Game Gear.
Other mistake: They live in Los Angeles. When they left to go to Patusan, the scene showed a map and a toy ship with someone's hand guiding the ship along. On the ship they came from the Atlantic, through the Panama Canal, to the Pacific then onto Patusan. How did they start from the Atlantic when they lived in Los Angeles?
Iggy: All right, Kids, come in here and Clean up Yer Bloody Room! I know well, cuz I'm 37, and don't make Me beat You with Leg of Mine that no longer Works cuz I'll do it.
Johnny: Kwantsu, Dudes.
