Since "Will I Be Able To Handle Harry Potter and the Forbin Project Because of (enter thing person is afraid of here)" posts pop up so often, and since I rode it recently enough for it to be fresh in my memory, I give you a public service announcement:
Auntie Tricia's Handy-Dandy Islands of Adventure Harry Potter and the Gooey Kablooey Disclaimer Warning Sign Translation Guide!
What Universal's Official Warning Signs Say: Vague warning, something about claustrophobia.
What They Really Mean: This ride was made for people who are fond of being locked in a very snug box (and mind you, I am thin) which is arranged in such a way that the ride feels like a solo excursion even though your friends are six inches to the right and left of you.
What Universal's Official Warning Signs Say: Guests who suffer motion sickness maybe shouldn't ride, or something.
What They Really Mean: Guests who may freak the eff out when their flying box starts falling
backwards should be at least aware that this is going to happen. It's cool though; you never actually go upside-down, right?
What Universal's Official Warning Signs Say: This ride involves smoke and lighting effects.
What They Really Mean: Hey, do you enjoy monsters and dragons and giant spiders and more giant spiders and oh God, giant spiders everywhere and giant spiders for nigh on twenty damn minutes and antisocial trees and
demons who eat your sanity popping up like a couple of feet away from your face? Of course you do! Who wouldn't?
EDIT: By the way, I was not even aware of the dead basilisk. My attention was occupied by some other stuff. Basically, snakes are the least of your worries.