Don't know if anyone saw this yet but it's pretty interesting. There's a bunch for other comic characters too.

I've read that guy's book. 'The Physics of Superheroes' and I can recommend it to the scientifically inclined. It shows you things about Krypton based on Superman's ability to leap a tall building, as well as the force required. Or how the Flash can run through a wall with 'quantum tunneling'.

I read his book too. There is a point he makes about Flash's cosmic tredmill not really allowing him to travel through time, but last i knew it was only for passing through to other universes and dimensions not time travel...

I bet that guy has had a lot of girlfriends