Have you ever experienced anything Paranormal?

I had something cool happen last Saturday. I was in my kitchen putting up groceries (I had just been shopping), and I happened to catch movement and a shadow pass to the corner of my kitchen. I stood there for a moment acknowledging it and waiting to see if anything else happened but it never did. Later that night after everyone home had gone to their rooms I came back downstairs for a drink and noticed a coldness. After rounding the corner into my kitchen I noticed my front door was standing wide open. I shut the door, got something to drink, and went back upstairs checking on my way back up that everyone was still in their rooms (they were). My oldest son got home about an hour later, came to my room and asked me if there was a reason the refrigerator door was standing wide open...