Continuity mistake: When they get to the beach to surf the windows in the truck are left open, but after the shark attack Byron comes running back to call 911. The windows are now closed, so he has to throw the rock at the window and get the cell phone.
Revealing mistake: When Bethany comes home from the hospital after losing her arm, her dad drives them to the back of the house to avoid the reporters. Bethany has her arm covered up with a throw so it can't be seen. When she gets out of the car, you can clearly see the outline of her entire arm underneath the throw.
Other mistake: When Bethany Hamilton and her friends go to Phuket (Thailand), she sits down with a native Thai lady and a translator. The woman is telling the story of how she lost her entire family to the massive wave. Unfortunately, the woman is not speaking Thai at all. She is speaking Indonesian.
Continuity mistake: When the whole family is in the kitchen on the day that Bethany comes home from the hospital, mom asks who wants sandwiches. Bethany tries to cut the tomato but it falls on the floor so mom picks it up and starts to cut it. When the camera is zoomed out, mom makes the first cut of the tomato, when the camera zooms back in on mom cutting the tomato, she makes the first cut again.