The mirror.

Scott was a normal individual. The only thing different some might say was his imagination, which constantly led him into trouble. Was twenty years old and was the youngest of a family of three and was by far the disappointment of the family. So he always kept to himself when he was home and around his family. He lived in New York City and everyday he went to the roof of his apartment building and just looked at the city and thought. 
Little did he know, on this very roof, he would witness something that would change his life forever. 
There was a particular mirror on this roof that Scott always was at, but he never paid any attention to it. The mirror was about five feet tall and 2 feet in width. It has a golden-silver trim around it and a medieval look about it. The thing about this mirror though, was that it always seemed like he wasn’t looking at a reflection of himself, that he was looking at someone trapped inside that was copying him. 
Subconsciously Scott realized this but he never wanted to admit it, he didn’t want anyone to think that he was crazy. Or worse, thinking to himself he was crazy. So he went on using this strange mirror and finally, something happened that he could not believe. 
While Scott was looking into the mirror, because he was getting ready for a date that evening, he saw his reflection, mouth something. He ignored it at first but it did it again, and again. It was mouthing, “Help me, Help me”. He knew for a fact this was not him because he had a cigarette in his mouth and it was still there. This…man he saw in the mirror looked exactly like him but had the cigarette in his hand and was mouthing words. 
Was he hallucinating? Or was there actually another man in this mirror, a version of himself but in another dimension? He didn’t know but he had to find out, he tried every way to get this man out of the mirror. Pulling, pushing, everything he could think of. But there was one problem.

The only thing stopping him was himself trying to do the same thing on the other side.