Continuity mistake: When Rebecca Wenteworth is walking towards the baseball diamond, she is looking behind her and waving. When she gets hit in the head with the ball, it's on the wrong side of the face. She should have been hit on the left side of the face.
Continuity mistake: In the scene where Simon goes in the church to retrieve his baseball cards he climbs on the file cabinets with a flash light. He places the flashlight on top of the card box which is shining to the right. The flashlight falls behind the box, still facing right. The next shot is the back of his head, then a shot of his puzzled facial expression. The next shot is of the flashlight facing left on the baseball.
Continuity mistake: As the bus heads down the hill towards the lake we see Simon with his glasses on - then there is a close-up of him without his glasses, then as the bus hits the water he's wearing them again and they fly off and hit the floor.
Other mistake: In the second baseball scene, Joe is sitting on the bench next to one character with the number 8 and Simon, who is on Joe's other side is also number 8. Two players on the same team would not be the same number.