Loud Bang,Cat Scared And Angel Upside Down In Playroom

I was upstairs using the restroom and Karen & Lottie were downstairs in the livingroom watching a movie. I heard a loud bang coming from the kitchen area and yelled down and asked what that was. The response from Karen & Lottie was I don't know. I went out and looked and really seen nothing, but wicker canister on kitchen floor, was expecting to see a big mess by the way it sounded. Came back in through the diningroom and come to find our one cat was hiding between the table and the wall and really scared, she was looking towards the playroom, she would not move. I went into the playroom and seen that our one ceramic angel was laying part way across the playroom floor and it was upside down and no one knows how it got there. A note: the cat that was in the diningroom hiding between table and wall is creeping around the house and looking all around, like she is expecting to see something.