How is this comfortable?

Last night, our kids wanted to sleep in the tent in the family room, but after an hour of giggling and fighting, we sent them back to their beds. Miles generally sleeps with Monet for a few hours, then comes and climbs into bed with Daddy. But last night, he had other plans. We went up to the girls room and found this:
He had laid a blanket below him, stuffed his Lightning McQueen pillow behind, and climbed in. I guess months of napping in the car seat has made upright sleeping pretty comfy!