Yep. You got me.
It's funny the things people will believe after reading about it in a book of fiction, or seeing it in a movie, such as thinking you can suck the rattlesnake venom out of a victim, like John Wayne did in True Grit.
Even so-called 'experts' fall victim. For example, supposedly after seeing James Bond's mini-rebreather in Thunderball, the RN approached the production company to find out how they made the rebreather work. They were told it was movie-magic. The actors were holding their breathe. Multiple takes were edited together to look like one long sequence.