The phobia of being scared. If you have it, you're literary scared of being scared... It's like, phobiception.
You're scared that you'll be scared, but then you realise you're scared of being scared, so then you're scared and then you're even more scared, because you just realised you're scared of being scared and that makes you even more scared which makes you so scared that you're very very scared which completely scares you and you're so scared of being scared that you can't help being scared, but you're scared that you are scared... That's phobophobia for you :/
Photophobia is a fear of, or adverse physical or psychological reaction to light. Whether from rapid change of light intensity, or sudden burst of bright light, as from a camera flash. Not to be confused with heliophobia, which is a fear of the Sun.
When we went to the laser light show, Jon must've got a case of photophobia. He puked and had a seizure.