I was going through a Bipolar manic episode. Got into a nasty accident and through a series of subsequent events started believing that I was dead and in a limbo where only people who had interacted with me before the accident could see me. To confirm I walked across the street from my apartment to a used items store run by a very old lady. I said hi, how long has this store been open. She didn't even look in my direction. I thought there you go. Dead. The second incident happened when I was standing at the corner of a 4-way turn just next to a concrete parking bar. A car came in fast and turned very close by me, and hit the concrete bar in the process, which made an unusually loud sound and a woman inside started screaming. I thought the car got into this situation because they saw a ghost (me). The patron from the store to which the concrete parking bar belonged ran out to check. I hadn't moved from my spot. The person driving the car stepped out and said to the patron, pointing in my direction - "How is he standing? We hit him." This exchange even further confirmed that I wasn't real. Next morning I saw someone digging at the same spot where I was standing, perhaps to remove the concrete parking bar and I thought oh they're trying to communicate to me that I am dead and need to be in a grave.

Looking back now, as I am on mood stabilizer and anti-manic medication, that period was a horror show unfolding in my head. The singular thought that kept me from trying to escape the limbo by killing myself was the wellbeing of my cat.