Flight of the Navigator (1986)

Original Title: Flight of the Navigator (1986)

David is a teenager starting to realize that he is growing up. Always fighting with his younger brother Jeff, David falls into a ravine. When he wakes up, he heads back home only to find that his family is not living there any longer. When he goes to the police, they all have aged and they tell David that he has been missing for years, not for hours. Apparently, 8 years have passed, and the come back of David happens at the same time that an alien ship is intercepted by NASA. And these aliens have a lot to do to what happened to David.