The horror of thinking the sun is going to explode. The horror of thinking the people that care the most about him are going to kill him. The horror of thinking there's faces in the sidewalk. The horror of thinking aliens visit him and attempt to abduct him. The horror of thinking he gets messages from the aliens via the static on a TV. The horror of thinking he's married to someone else who doesn't know who he is. The horror of not being able to look after himself or work. The horror of him being homeless in another country because the system there failed him. I could go on for hours.
I know several others since the legalization of pot who induced schizophrenia in themselves in adulthood. Overeating? Consider yourself lucky.