He manages to convince the kindly school nurse that there is something going on, although she's not quite sure how much to believe. He also figures out that all the people who are not themselves anymore have a bandage on the back of their necks. Both David and the nurse end up at the military base where they try to get the General that there are aliens taking over the town.
The space ship under the ground is really cool looking. The monsters aren't scary but they are interesting looking. The film is entertaining but might have been better if the David were a more experienced actor. Sometimes he manages to nail it, but more often than not he isn't believable and has a Little Rascals feel to his reading of the lines.