I was stationed in West Berlin in the late 80's. Occasionaly we would have guard detail at clay compound which was the offices of the high brass and was a previous nazi headquarters building. If you had duty at night there was just 2 of you there and every hour you had to walk the halls and initial multiple clipboards to timestamp your rounds. The halls were huge and long and in a square configuration. When you got about the middle of one hall you would hear someone approaching you from behind and around the corner if you ran back to check it out it would resume it's walking at the other end it would drive you crazy if you didn't know what it was.
It would do it even when you were standing still so no it wasn't an echo. Submitted by Steve
Something very weird happened to me at 2008. 2007 my first cat died and I still was sad about it. At the day 2008 I was in bed but couldn't sleep so I listened to the silence of night. Suddenly I could hear a sound on the stairs a sound you normally hear when someone moves on it. I also hear that kind of sound when my cat (the second one) is aware to come into my room so I thought that my cat is coming. I could hear her soft feet walking over the carpet. I was the whole time not sure if I only imagine it or if there really was someone walking. Than it felt like something would jump on my bed. It must have been something heavy because my bed was shaking. At this moment I was sure it wasn't an imagination. Than I could feel how three small steps walked over my blanket until they stopped.