I am working in the Artificial Intelligence area. I am thinking of two events happened to me.
1) I have the same dream over many years. While writing the post, I could not recall what exactly the dream now.
2) While I drove to pass a large field of peach flowers, I recalled the moment that I biked to high school and passed a large field of peach flowers.
Both events normally would not come to my mind at all. It seems deep in the brain, there are some super charged neurons which store some unique information, can be trigged by some specific outside stimulus.
I believe in the AI algorithm design, we should add such neurons. It stays there for a specific event, occasionally trigged by a specific type of stimulus.