Scleral flash.
When the whites at the top of the eyes are seen.
The muscles which reveal the white at the top of the eyes are very rarely used by most people. Usually, their use is only in instances of extreme fear, or extreme rage. They are rarely exercised. If it happens easily and often, it is because those muscles were exercised and used often.
Try it in the mirror. It doesn’t come naturally for most people.
If one encounters someone who flashes the upper sclera in normal and casual communication, BEWARE. This person probably has severe rage issues. You’ll see it very soon and it will be very ugly.
...this concludes this Public Service Announcement
that is awesome info Z ! Thank you. I tried it, and it freaking hurt lol