Pretty obscure references, but I found some of the Werewolf transformations of 'Company of Wolves' more frightening than the ones listed and I saw it after many of the aforementioned. (Kudos on Pinnochio.)

YES!

Go straight to 1m10s

Lovecraft^^. Stephen King. Michael Crichton and- if we're getting all historic- Poe.

If you subscribe to the theory of human pheromones, then the baby's fontanelle may release a pheromone which triggers an endorphin release, calming and bonding the parent.

Beyond the geeky nature of Tron there is also this spiritual/religious subtext.