Freddie just disturbed from a sleep. He occasionally adopts this strange sleeping pose where he is on his back with legs straight up. The first time he was found like this it was a slight panic until he woke up and stood upright. Now this position is quite common for him, he will lie like this on top of his nestbox for hours at a time and especially enjoys when there is something soft underneath such as an old towel.
He will also fall asleep like this on a convenient human arm if the human will stay still long enough.