Spiders on an Elevator would freak me out! That is so much worse than snakes on a plane -- smaller space, spiders are very fast and agile and there would be nowhere to go! At least with the snakes you could curl up in your seat or hide in the overhead compartment.

Also, eeep to the scary turnstile experience. I really, really will not tell you a story on L&O:CI in which something like that featured.