It was the closest thing that came to my mind when you said bodyparts crossing the line before the bike. And in this particular case Walscheid would have won if the deciding factor for the win was his body. The only thing Gaviria had in front was his wheel cause of the bike throw. His entire body itself was behind his opponents. But no idea how they would actually rule it if they would fly over the line and their bikes a second later 
Has that ever happened? That a crash was that close to the line that the "victor" was not riding but rather flying over the line?
Has that ever happened? That a crash was that close to the line that the "victor" was not riding but rather flying over the line?