Space Camp
IMDb lists Kevin Gage in the credits as a NASA camp counselor, but in fact his scenes were left on the cutting room floor. *awww* Hey, it happens to the best of them, and he was able to get his SAG card in the process.
About the film, in case you want to watch it anyway:
Teens at a NASA summer “space camp” get more than they bargained for when they are accidentally launched into space. Good movie for older kids requires suspension of disbelief at the robots, NASA incompetency and precocious youngsters, but if you can let go of science just a bit you might enjoy yourself. One can see how vivacious young Kelly Preston would be irresistible to the males on the set, Kevin included. Kate Capshaw and Tom Skerritt are the solid adults in the film, and Lea Thompson does a great job as a serious young scientist.