During the final climb up the infamous Mount Ventoux of the lengthy stage 12, Chris Froome and former teammate, Richie Porte, had a sizeable cushion ahead of the other GC contenders. That was until Porte rammed into the back of a stopped motorcycle and Froome followed. What transpired after, easily makes this one of the most bizarre events in Tour de France history.
Froome, wearing the maillot jaune, had a broken bike. With no team cars or teammates in sight, he began running up Mount Ventoux as he saw his lead in jeopardy. A neutral support vehicle gave Froome a bike, but the clipless pedals didn't match his shoes. Throwing the bike to the side, Froome took to running again. He would eventually get a Team Sky bike, but only after losing time to other contenders and subsequently ending up in fifth place. However, the race organizers ultimately reversed the gaps, keeping Froome in yellow.