I have to concentrate pretty hard too, and I'm always missing bits and bobs and don't quite grasp the general plot of the film and get confused by scene changes. It's probably due to being easily distracted in general, having a low attention span and having a 'one track mind'. It's a bummer really as I love watching films and I'm often very interested in the films I do watch, and enjoy them thoroughly, but others always discuss details of the film that I've somehow missed, not just minor details either but things that are seemingly essential to the storyline.
I've often heard of and read about people with ASDs "focusing on the details but not taking in the whole", but when I watch films it seems to be the other way round - I take in the general essence of the movie but my mind always skips over the details. I'm like that with lots of other things too.
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THINGS I LIKE
Parasaurolophus, Plesiosaurs, Dinosaurs, Pterosaurs, Music, Tuna, Chocolate milk, Oreos, Blue things
Parasaurolophuscolobus. Parasaurcolobus. Colobusaurolophus.
....And Nunchucks are my friends.