If he concentrated too much on the perspective of each jump, it got dizzying. But it flooded him with this kind of energy, like endorphins being released the higher they went. Except he knew nothing of this scientific term, so it was just an experience of a really good feeling, having fun and messing up the bed.

"Yeah!" he piped up as he went down, boosting himself back up into the air again. "It's great!"