Ah. Well he doesn't take the offered hand in fact he might flinch slightly when its offered. He might pause for a second before giving the other a sheepish, if awkward smile back. He's sorry if he's rude but there's reason?!

Sorry! I'm not really good with that sort of thing.

Hand shaking he means. Instead he'll just type something else up to try and not make it as awkward.

It's very nice to meet you! I hope we can get through this without too much trouble.