Watching this movie at 22 years old, I was intrigued with the concept of The Id and it has stayed with me, and I often realise just how powerful and incredible is what the mind can get your body to achieve. Actually, as shown in the movie, it is frightening and one has to be vigilant. Oddly, I tried looking up the definition of The Id on Google, and apparently, they have either never heard of it, or, have no idea.
Would love to see the movie again.