Factual error: One of the subplots involves a young boy ("Tommy") who is bitten by a cobra and the attempts to save his life. When they are working on his arm, it is horribly swollen & filled with fluid which they drain by cutting open his arm. Cobras secrete a neurotoxic venom which attacks the nervous system. It would not cause noticeable swelling at the bite site. The symptoms Tommy has would indicate a bite from a snake which secretes a hemotoxic venom (such as a rattlesnake), which attacks the blood stream & tissues, causing swelling.

Snakes on a Plane (2006)
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Directed by: David R. Ellis
Starring: Samuel L. Jackson, Julianna Margulies, Nathan Phillips, Rachel Blanchard
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Neville Flynn: Enough is enough! I have had it with these motherfucking snakes on this motherfucking plane!
Trivia: Take a look at the button the flight attendant presses when he puts the snake in the microwave. It's conveniently labelled "Snake".





Answer: It depends on whose airspace you are in when it occurs, whether or not anyone else sees you (public indecency), the laws of the nation that the airline is based in, etc.
Grumpy Scot