Continuity mistake: During the scene where Utah is chasing the ex-president, we see Ronald Reagan run out of a house and scale a fence into a neighbours garden, instead of running down the driveway. The next shot then shows Utah running out of the house with the fence coming into view, but without seeing the ex-president, and then give chase over the fence. He wouldn't have known to jump over the fence, because he wouldn't have seen him go over it.
Continuity mistake: In the stakeout at Latigo Beach, Pappas is surveying Utah's surfing activities from a parked car with binoculars. Pappas takes off his sunglasses and puts them on the dashboard. Watch the sunglasses change position from upside down to right side up for no reason and in a matter of seconds between shots of Pappas watching Utah surf and then especially when Pappas and Utah are communicating on the radio.
Continuity mistake: In the night surfing scene, as Johnny gets up for the first wave, he is riding regular (left foot forward), but as the camera cuts back and forth he jumps back and forth between this stance and goofy (right foot forward). All other surfing shots of Johnny in the movie show him surfing goofy.