That's the craziest story ever. I found it hard to be true, even though a few people on there seen to be verifying it, but when you see the video link, (WARNING: DO NOT play loud volume at work!!!!) you realize it probably did happen.
Reminds me of a story about norwegian Knut Knudsen (i think it was him) during a world championship in the 70s where he really had to go. He ended up going in his cycling hat during a downhill part and all seemed to be fine until he threw his cap away at the side of the road and some spectators quickly ran for the hat to get a souvenir not knowing the surprise that awaited them...
Didn't Greg LeMond have some kind of stomach virus where he had to relieve himself on the bike? I think that was during the 1990 TDF just in time for a critical mountain stage. He won because nobody wanted to follow him after he shat himself.
2002 Roubaix there is some hilarious footage of Boonen whipping out his "little buddy" in a effort to relieve himself in the middle of a pace line. Rookie mistake, move to the back of the line next time Tommeke!!!