That is the sort of thing that would happen to me- my cats are always wiggling under the cushions, trying to spelunk into the depths. I can’t imagine how that cat managed to get totally stuck inside the couch, though.
Fortunately the story has a happy ending, but that poor cat! He wiggles inside his favorite hiding place and wakes up in a new house!
There’s no way it would have taken 10 days to find Calypso, though. If I am 10 minutes late in feeding her she howls like a mountain lion in heat. She probably would have chewed her way out by the second morning.