I attended a track day at the Texas Motorsports Ranch in Cresson, Texas on Aug 4th....man what a blast! Here is a pic of me through the horse shoe. I never got my knee down, but I did drag my footpeg several times. I would think my knee would touch the ground before my friggin' footpeg, I guess I need to work on my posture/lean. Going to the track almost makes me lose the urge to ride on the street.
http://www.a-h-b-a.org/TrackPic8.jpg
http://www.a-h-b-a.org/TrackPic8.jpg