The ending was begging for (spoilers of course)...
A telepathic showdown between father and daughter, ala Carrie. That was really my only letdown from this amazing movie. It seemed to run out of steam and turned into a slasher. I still enjoyed it but really expected a brain melting, head exploding, showdown like in Scanners.
"Call me if you ever feel to old to drive" - Me and You and Everyone We Know