Dreams.

I had a dream about prison today. My friend from school (he's in a different prison) asked me about my long, unkempt hair, saying something like, "Why don't you get a haircut? Aren't you afraid they'll ask why you look like a woman?" I explained, "Those skinny, narrow-minded guys are going to ask? I don't need to listen to those losers; I told them to go to hell." Our classmate walked by and laughed at what I said.
Despite the overall harmlessness of the dream, I woke up in a terrible mood. The atmosphere of prison has a negative effect even in dreams.