Right after the disappearance of the scoutmaster we look at the scene, where Dr. Hynek extracts film from scoutmaster's camera for further developing. You can not do this in a darkroom with red light, the film will be damaged. You can only print on photo paper using photographic enlarger under the red light. The film should be extracted in complete dark since it's way more sensitive to light than photo paper.
Professor Hynek identified sulfur and methane from smell. Methane has no smell.
The Choctaw never lived around Bowling Green, Ohio, and there is no reservation of any kind nearby, let alone for the Choctaw.
Bowling Green, OH, is about 2 hours northwest of Columbus, not "down south" as Quinn said. It sits in the middle of flat farmland. There are no mountains anywhere nearby, nor any forests.
Dr Hynek talks about Halley's Comet, but he pronounces it with a long "a," like "pay." However, Halley is pronounced with a short "a," like "pad."
Twice, Hynek pronounces "Bowling Green" as "BOWL-ing green." Ohioans would pronounce it as "Bowling Green," with equal emphasis on "bowl" and "green." If anything, "green" would have more emphasis. He pronounces it more correctly the third time.