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Headscratchers: The Texas Chain Saw Massacre (1974)
Why, when Franklin was cut with a razor by the Hitchhiker, did the crew not make it their top priority to get him to a hospital/clinic? Or at least sterilize the wound with some soap or something. Instead, they just make a makeshift bandage for him. I know if a crazy guy who works with meat with a (probably) dirty blade I would definitely want to see a doctor post haste.
They were in a seemingly supply-less van in what appeared to be the middle of nowhere. Crappy makeshift bandages were probably all they had, and they probably stupidly thought it would be enough.
Also, in the following scene, they pull up to a gas station only to find no fuel. Chances are even if they wanted to get Franklin to a hospital, they wouldn't've gotten far.