Why do (sometimes) seemingly unimportant moments really stick as detailed memories, and some seemingly very important moments are hard to recall?

Question

At times, apparently mundane memories are really easy to recall, and moments you think ‘I want to remember this in detail, even gonna do an eye-camera pan of the scene’ don’t come back that easy. Why?

In: Biology

Answer 1

When I was a teenager, one day I was on my bike, riding across the street. A bus drove past me and a speck of dust or grit or something got in my eye. I pulled over, took a moment to get it out and distinctly remember thinking, “I will always remember this moment.” And I do! Not every day, but it comes back a couple times a year. (I think?)