The open Cell and the unspoken Sentence

"I was in a jail cell, but I don't remember getting arrested or what I did. I just remember sitting on a bunk while an officer told me I had to stay, but he wouldn't say for how long. I kept asking and he just walked away. The cell looked like my old bedroom, except the door had bars and there was a tiny window too high up to see out of. I kept checking my pockets for my phone, but all I found was a receipt from a store I've never been to. At some point I was in a hallway with other people, all waiting in line for food. Nobody talked. I wanted to ask someone what was going on, but I felt like I'd get in trouble just for speaking. Then I was back in the cell, and the door was open. I knew I could leave, but I didn't. I woke up before I understood why, still feeling that heavy, stuck feeling."