Year 3 - Day 110 - April 19

This happened to an outside pane of glass in the hallway at school today. Nobody knows how it happened. The leading theory is that it was hit by either a rock during the lawn mowing/weed wacking, or that a bird hit it and then flew away. There's nothing nearby to give any clues. Luckily, it's safety glass. Also luckily it's the outside pane.