You saying the word "clusters" just made me want to throw up.
I am trying to eat sausages and now I feel ill. It's only certain clusters that bother me, it's mainly just one image that's the worst, an x-ray of a child's skull showing all of their adult teeth inside the skull before the baby teeth have fallen out.
Anyway I have a huge fear of rats, mice, butterflies, moths, maggots, flies, most dead animals, especially dead birds.