Like many of the others here I say don't worry about it. Put your attention back on riding. Everytime I get out on a track, the first time my knee touches down it scares me because I'm just not expecting it. "WOW! I'm leaned over that far? Cool! Oops, Next turn..."
In the picture, you look a little big (could just be an odd angle there), leathers don't seem to like stretching around big mid-sections. I know that from personal experience.
Relax, develop your skills, go faster, the knee thing will happen.
Greg Gorman