The Encounter That Wasn't

'Hey! Watch it you jerk.' I turned around to see the face of the idiot who had slammed their shoulder into mine. As I approached the one-eighty mark my face slammed into the face of...myself?
I stood face to face with an individual who was identical to me. I had no idea of what was going on, in fact, I had no idea of where I was or even who I was. Everything became unfamiliar, my thoughts crashed into each other like cars and I was gasping for air. My sense of knowing dripped down the walls of my head, I was disoriented.
I stared hard into the eyes of the person standing in front of me, looking for the answer to the question I didn't even know I was thinking.
'What's going on?' I asked with as much strength as I could force out of my quivering lips. The person who I was facing just stood there, staring blankly past me. I repeated my question several times before I gave up.
I checked out my surroundings. All around me was black. I could not see any walls or doors, it was all an endless open space of darkness. Blood was rushing to my head and I began to feel dizzy, everything was spinning around me. All of a sudden, the never ending space began shrinking, I was about to be compacted by what resembled a black hole.
The only light I could see was the glow of the unfamiliar person who was the exact replica of myself. I ran over toward the clone planning on shaking the information out. I reached out to grab hold of the shoulders that had bashed mine, only to smash my hands into a glass wall that stood between us. I slapped and punched the glass wall in fury. I didn't know what was happening and I didn't want to be left alone. I banged the glass with my fists as if I was attempting to break through it. To be honest, I had no idea what my plan was, only that I did not want to be suffocated by the walls of endlessness closing in on me.
The amount of force that I was hitting with shattered the glass wall to tiny shards. I looked up, I wanted to see that face that had been staring so blankly. Nothing. I looked up to see more blackness. It had been a mirror I was looking at, it was me who I was face to face with.
Still, nothing made sense. What did any of it mean? I was so alone, I didn't even have myself for company any more. Claustrophobia (which I never knew I had) set its claws into me as the black walls became close enough to touch my shoulders. I was hyperventilating, and anxious of what was to come. My shoulders were being squeezed by an invisible black force. Tighter and tighter, I had no room to inhale, I felt my heart stop.
...

I woke up to the same four white walls that I had seen for God knows how long. I rolled out of bed and tiptoed on the cold tile floor to my mirror. I rubbed the sleep out of my eyes and looked onto the mirror. Nothing. I was alone.