I went into the Central State tunnels with a friend. The instant we went down the steps and entered a boiler room, loud metal banging noises started happening all around us. We shined our lights every direction that we heard it but, nothing was there. The boiler system was still there but, it was an abandoned building and not in use. The banging noise sounded like someone had a pipe in their hand and was circling around us and slamming a pipe against the boiler sytem. It banged extremely loud about 10 times. we went into the tunnel. We came to a room that looked like a bigger boiler room. After we passed there, I felt an extremely cold spot so I turned on my EVP recorder. I then said, I'm sorry you didnt get a proper burial. My friend had walked to the next doorway. He said, OMG! Theres somebody in here! OMG! He just picked up a pipe! He looks pissed! OMG, RUN! So, we both ran out. As we ran out the door, two guys dressed up in matching uniforms with some paranormal patches and ghost hunting gear were walking up. We didnt say anything and ran past them. We went to have a drink nearby. I said so what did you see? He said I think it was a homeless guy. He had on a WW2 jacket. He said he went over to some steps, went up a couple of steps, reached down, grabbed a pipe, squatted down, put the pipe across his legs, and looked at him like he wanted to kill him. I said, I'm surprised we didn't see his light before we got there. He said he didnt have a light. I said, it is pitch dark down there and debris all over the floors. How could he walk through there? He said now that you mention it, I didnt see his legs moving. It was like he was gliding. At that moment, he realized he had seen a ghost and had never believed in them before.