It was an average day at the bunker. Team fee will was inbetween hunts, so Sam was reading, Dean was watching some show In the TV in the batcave, and Cas was learning how to use human inventions. Dean and Sam had explained to Cas how use a toaster that morning. Dean and Sam were relaxing when they heard an inhuman screech echo through the bunker. They grabbed their guns and ran out to see what had happened, only to find Cas back pressed againsy a wall face in shock woth two peices of toast next to him. Cas looked up slowly, "You didn't tell me that they flew," he said.
This was the first of many incidents like that.