I think it's because all of the eyes are in the exact same spot. that and the speed of the changes....it makes your brain lag behind and try to see the face as the same.... so when the face shape is slightly different, it appears to stretch and bulge or squish instead of being seen as a brand new image.
but that's just my guess
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There's a Shadow just behind me. Shrouding every step I take. Making every promise empty, pointing every finger at me. _tool
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