Ah, that's VMX legend and CZ nut, John Boag. Don't judge the book by its cover - he's quick on these old bikes, no matter how rough they look.
He's a top bloke - I spoke to him a bit at CD5, but at CD6 I had the pleasure of spending quite a bit of time talking to him, Cookie (he of the awesome Ossas), YZ250H (he of the vulnerable esky), and Fay (Boagy's wife) on Sunday night.
One of the highlights of my weekend.