I hope you actually didn't SEE it as much as read about it. From Runner's World Online:
Koskei, Biktasheva Kick Butt at Bay to Breakers
It isn't often that James Koskei sees any runner's back, and even less often that he sees an American runner's back. And he's surely never seen as much of an American runner's backside as he did Sunday at the Albertson's Bay to Breakers 12-K.
At the 1-mile mark, Koskei was in a crowd of Kenyans behind, well, Eric Ollila's behind. Ollila led the first mile wearing nothing but red-white-and-blue thong underwear, with "Hail to the Cheeks" scrawled above it on his back. On his chest was "Party Bush" and covering his face was a George W. Bush mask.
"It was just for fun," said Ollila after fading to a respectable 14th-place finish.
Will T&FN run photos in the next issue?