 He did have that turn of mind.He was the kind of bloke who'd think it was a good joke to write this very informed sounding piece, full of really good physics (and it has got some proper physics in it), describing how to build a time machine, which is actually about how to build a bicycle, buried under this smoke-screen of physics that sounds authentic.Jarrey got into doing this thing called 'Petaphysics' , which is a sort of French joke science.