When I had my cats spayed and brought them back from the vet, I carried them out of the car in a cardboard box one by one. The cats were still mostly unconscious, so I didn't close the box. But as I carried it up one flight of stairs, one kitty woke up and jumped out, then started running away from me up and down all the stairs in the house. It was terrifying! He was still half-paralyzed from the anesthesia and he kept falling over, but he was so scared all he thought about was running away from me. I never thought catching a half-unconscious cat could be so hard.