Night of the Comet (1984) review

A comet is supposed to fly by Earth and people are excited to see it (the way they get hyped up for solar eclipses) except its presence turns nearly everyone into red dust with the exception of a few people, including two hip sisters (Catherine Mary Stewart and Kelli Maroney), a Hispanic guy (Robert Beltran), some mutants and a team of scientists who want to siphon blood out of survivors.  It's cross-listed as being a combo of sci-fi, horror and comedy except it's terrible at all three (particularly the last two); the bright red filters and cheap effects and campy acting are enough to give anyone a headache (try not to claw your face off when you see the predecessors of the Trenchcoat Mafia wielding machine guns in a department store).  Among its many failings, it also refuses to address precisely what transpired and how some people were kept intact and not others - and who set up the "think tank?" - but that might be because Eberhardt was most likely huffing Rave Hair Spray when he wrote it.