Jelorian

One day I was babysitting my girlfriend's (ex-girlfriend now) nephew and niece. The boy was almost 2 and the girl was about 9 months old. It was mid day and I was watching TV. The kids were playing with some toys near the base of the stairs which was also close to the front door of the apartment. From their vantage point they could see if anyone was coming down the stairs. From where I was, I could only see them. There was no one else in the apartment except us. All of a sudden they both start babbling and looking up the stairs as if someone were either coming down or just sitting in the middle. The way they were acting was like if you sitting there talking to them and offering them a toy or candy. It was pretty damn freaky and this went on for about 5 minutes. I was too damn scared to check out what they were looking at, but something/someone had BOTH their attention. They later went back to playing with their toys. I asked their parents if they had ever done that before and they both said no.