But here's an even creepier one.

My youngest brother is temporarily living with us. He has a room downstairs just off the living room. As you're facing the garage door, his room is at the end of a short hallway to the right, and there is a closet to the left.

He and I were standing in the living room talking, when he suddenly said, "Was that one of your kids that just ran by?" He pointed to where his room is and said he just saw a kid run from his room into the (closed) closet opposite it. I could see the area the whole time and didn't see anything. We opened the closet and checked, and there was nobody in there.

We have no explanation. It was daytime, and we were about 10 feet from the closet, so it wasn't a long distance.