I was making a sandwich at my kitchen counter, when my knife block fell over on its side with a loud bang. The block weighed 5 lbs and was 3' away from me with nothing near it and nothing connecting the knife block with anything I was touching. It was under cabinets in the "L" of the counter so nothing could have fallen on it and could not have been touched by an elbow or any part of my body without some contortion on my part. I tried to knock it over and found I had to give it a hard push for that to happen. There was no earthquake activity (I checked), no glasses or china rattled in the cabinets above me. I am at a complete loss to explain this. I've been thinking about it since it happened and really need some type of explanation. Nothing bumped it, nothing was near it, nothing fell on it and the only person and activitiy going on it the kitchen was me quietly making a sandwich three feet away. Thanks for any ideas. B.