A spectacular 15th hour saw the lead change places twice in two laps as Marcel Fassler led Anthony Davidson by mere seconds in the Le Mans 24 Hours.
Fassler had taken the lead after a 25-minute safety car period wiped away the No. 9 Peugeot's hard-earned lead in the previous hour.
Just as the green flag fell, Simon Pagenaud pulled into the pits and handed over to Sebastien Bourdais. Not long after that Anthony Davidson pitted for more fuel, releasing Fassler at the front. The Swiss driver then pitted himself four laps later but emerged from the pits just in front of Davidson.
There then followed 15 minutes of pure entertainment as the pair ran nose to tail for two laps until Davidson dove down the inside into Indianapolis to take the lead.
Undeterred, Fassler kept his foot in and regathered his momentum through the Porsche Curves. The Audi stayed hooked to the Peugeot all the way back out to the Mulsanne and such was his presence in Davidson's mirrors that the Englishman locked his fronts and ran straight on at the first chicane. Fassler was back in the lead.
After that Davidson began to drop back at a rate of about a second a lap, suggesting that he had flat-spotted a tire.
Behind all this Bourdais ran third 24s back, waiting for his moment to pounce when Fassler and Davidson will inevitably have to make longer stops.
Nicolas Minassian handed over the No. 8 car in fourth over to Franck Montagny, now the best part of a lap down on the leaders.
Emmanuel Collard remains fifth in the Pescarolo ahead of Neel Jani's sole remaining Rebellion Lola.
Olivier Panis has brought the recovering ORECA Pug back up to seventh.
In the LMP2 class, a frantic restart saw the Greaves Zytek make a mistake and hand the lead to the Oreca of David Hallyday, only for Tom Kimber-Smith to fight back into the lead.
Oliver Gavin, still in the No. 74 Corvette, continues to lead the GTE Pro field. He's nearly a lap ahead of Giancarlo Fisichella in the AF Corse Ferrari, with Antonio Garcia now third in the second Chevrolet.
Darren Law's Flying Lizard Porsche remains on top in the GTE Am field.