The backflip has progressed. I am now doing it unassisted on the trampoline. There’s a moment before I throw it that is identical to moments that strike me sometimes if I think about the book I’ve just written.

The impact of the mind on an acrobatic move is massive. And can destroy it. Yet the mind has to be engaged to remind the body. The challenge is for long over high, straight arms, an arch, lift the hips with the legs straight, the push off against the floor from the shoulders for the final snap of the legs. The second part is crucial because that will give you the impetus to follow with more of them eventually.

I think of good tumbling like a sentence.