As presentations go, this one broke the ground. Once I'd unstuck my jaw from my chest, I ordered his latest book (it arrived 22 hours later). I then got down to taking notes and grabbing screenshots. They always say that a recording will be available later, but I have found that to be a half truth: later can be weeks, not days or hours and 'available' can mean after an edit. I need to reflect on this now, not after my brain has been scrambled several times more.