Apparently, a group of fans got a little too enthusiastic after the men's elite race at the USA Cycling Cyclocross National Championships in Kansas City on Sunday.
There may have been two incidents - but the culprits appear to be the same.
Bicycling magazine's story makes mention (and includes a blurry photo) of a scuffle between "two shirtless, pant-less guys" after Ryan Trebon's win:
Better photos of a (separate?) fight show people being shoved face-first into a pile of bikes. (One of them has been rumored to be Jelly Belly pro Brad Huff.) Those pics are within this slideshow or direct link by clicking here.