Interesting. Great that you shared it. Have never heard of something like this. To me it looks like one basic fear pattern matching gone wrong (wired differently than usual in the brain). I mean there must be some pre-wiring of object recognition in the brain that triggers on e.g. spider-like and snake-like forms. Why should such a wiring go wrong (mutation or whatever) and pattern-match against small-ringlike.

See also What universal experiences are you missing without realizing it. Where people mention a lot special things and maybe by now you can find something comparable to yours.