The final scene (in which Lucas returns to school a "hero" and gets the letterman's jacket) was a re-shoot. 20th Century Fox came back to Glenbard West for one day to re-shoot that entire sequence. It was supposed to take place in the fall, but they shot it in December of 1985 (around Christmas time) and the temperature was around zero, yet they still had to present the image that it was fall like weather, so they had us (the extras) wear shorts and t-shirts. Due to the cold, the breath of the extras could be seen outside so the cinematographer had to put gels on the windows to obscure the visible breath. That entire final sequence; Lucas entering the building, going up the stairs and him opening his locker was shot in one long day. The film crew had to be on set at 7:00 in the morning and they didn't finish shooting until well after midnight.
There are several things wrong with the Hail Mary play near the end of the movie, in which the
ball is thrown to a wide-open Lucas. First, it was an illegal football play. There can be only one forward pass per play, and the ball had already been thrown forward to Lucas to avoid a sack before Lucas threw it back to the quarterback and ran down field to make the "big catch." In addition, Lucas was never in control of the ball after it was thrown to him a second time, meaning the pass was incomplete when Lucas dropped the ball. Instead, the players treat the ball as being live, leading to Lucas tackling the opposing player and being injured. Lucas was also playing offensive tackle, and would therefore be an ineligible receiver unless the referee was notified, which he was not.
When Maggie drops Lucas off for the first time he leans the seat forward to collect his bike from the back seat and closed the door, not putting the seat back up. Even as Maggie grabs his net and umbrella the seat is still down. But when the camera shifts to the other side of the car, the seat is magically up again.