1. See spider. It's small. It's harmless probably. Don't feel inclined to get up to kill it.
2. Think about how I don't know anything about spiders.
3. Envision spider biting me in the night, resulting in paralysis and death. Kill spider.
20 minutes later:
4) Grinding teeth because I'm completely convinced spiders are going to eat me in my sleep. Not "sort of worried about it" or not "can't get it out of my mind." CONVINCED.
UPDATE: Feels like there are spiders all over me. Heart is racing. Must take a sleeping pill tonight.
PS I'M NOT AFRAID OF BUGS. Just roaches.