Looks like he downshifted to slow for the corner and popped the clutch, loosing traction on the rear. And he has absolutely no concept of countersteering and is afraid of lean angle.

The end of this video shows the PROPER downshift technique: http://lulop.com/post.php/2522
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Paul Herr
'88 FZR4/GSXR/YZF Frankenbike
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