Sci-fi kids movie

Hi I’m 25 and watched this movie in elementary school so 15-20 years ago. All I remember is that it was a sci fi movie with 2 teenagers. There was a barn and it appeared there was something in there because the doors were being pushed from the inside. I believe the barn doors were locked up with wire and one of the boys got pliers to try to open it. My memory is fuzzy and idk what happens there but later on one of them falls to what I think was a black hole. That’s all I remember.

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