When he looks around him he ‘sees everything’. In the following quote Christopher reveals why he sees everything and explains how it makes him feel.
"And when I see a new place, because I see everything, it is like when a computer is doing too many things at the same time and the central processor unit is blocked up and there isn't any space left to think about other things.
...and I have to close my eyes and put my hands over my ears and groan, which is like pressing CTRL + ALT + DEL and shutting down programs ... so that I can remember what I am doing and where I am meant to be going." *²
This quote is one of the perfect examples of the difficulties that Christopher, as an autistic boy, has to face in everyday situations. Around a crowd it becomes even harder for him as he doesn’t like that they can talk to you or do things that you don’t expect, so he is obliged to notice everything and things that might happen. Christopher is a great deal better at understanding patterns than understanding and relating to other humans. This is why he is very fond of prime numbers. As well as liking prime numbers, Christopher also has many other likes and dislikes that he is very picky