When I was a kid, I would lay on the floor and put my feet on the wall and sort of walk-slide myself forward; from that point of view I could pretend I was Spider-Man or a gecko or something like that. I can only assume that’s what he’s doing as well. 
My cats have an obsession with stepping on my laptop constantly, and i mean all the time. They open tabs, apps, turn thing on and off but most importantly they type.
One of them just did this and i thought it was so insightful i had to share, and ig this is a little leak of the next chapter