Two things I would've changed...
1. Made two different "black hole" ball devices. The one that zapped all of Zane's radio equipment should have been a lot smaller than the one at the radio antenna since the one at Zane's took all the equipment without destroying the house whereas the one at the antenna was clearly stronger bringing down an entire antenna.
2. Made it more convincing that Zane and Char were trapped at the end and HAD to climb up through the antenna. They easily couldve either chopped through the front windshield of that van or at least TRIED to drive the van forward again.
Thoughts? Comments?