It is easy to get caught off guard on even slow turns. I have done almost the same thing on a turn and ended up in the other lane with a F-250 coming right at me. Scared the bejeemers out of both of us.....but we both made.
I have seen quite accomplished riders lose their concentration and almost wreck... I didn't watch the full length vid so I will withhold my judgement but what I have seen in the short vid... Looks like he completly spaced out or had a target fixation issue. I love the comments people leave. It is nice to see how kind people are when they are completly anonymous and have only seen a small clip. Glad the guy didn't meet the grill head on.