Did he stick his leg out and catch it on something? Did he have on knee braces? ( i think they cause more harm than good sometimes...)
That is an odd injury and I sure hope things go well. i worry for any one who has to fly out from the races and there have been helicopters at a lot of races this season regardless of the series.
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Kevin R. A644,444(red),H44
Tyler R. A119, 19R, T29
Joanna R. L258 Toro,L358
Jean R. Photograher extradordinaire-u keep the Rucks in Line