of the course being clear and bright while another stretch is rainy and slippery. Eau Rouge The most famous part of the circuit is the Eau Rouge and Raidillon combination. Having negotiated the La Source hairpin, drivers race down a straight to the point where the track crosses the Eau Rouge stream for the first time, before being launched steeply uphill into a sweeping left-right-left series of corners with a blind summit. Properly speaking, the Eau Rouge corner is only the left-hander at the bottom. The following right-hander that leads steeply uphill, which was introduced in 1939 to shortcut the original Ancienne Douane hairpin, is called . The corner requires an amount of skill from the driver to negotiate it well and the long Kemmel straight ahead produces good overtaking opportunities for drivers at the following "Les Combes" corner. The corner was tighter and narrower before 1970, allowing drivers to take the corner faster. Double F1 World Champion Fernando Alonso explained: A challenge for drivers has always been to take Eau Rouge/Raidillon flat out. Touring cars can take the corner at , and Formula One cars at over due to high downforce. World Champion Jacques Villeneuve once spoke of the effects of downforce, saying that to get through the corner the drivers have to drive faster, because downforce increases the faster a race car goes. Without lifting the throttle through Eau Rouge, a car would be flat out from La Source, along the Kemmel straight to Les Combes, a total distance of . A loss of control through this section can often lead to a very heavy shunt, as usually the rear end of the car is lost and the resulting impact is often lateral. Several famous racing drivers have crashed while driving through Eau Rouge/Raidillon, including Stefan Bellof in a Porsche sportscar, Guy Renard during the 1990 24h of Spa-Francorchamps in a Toyota Corolla GT, and Alex Zanardi in a season-ending crash during a practice session of the 1993 Belgian Grand Prix in a Lotus. Jacques Villeneuve suffered a spectacular crash at the top of Raidillon in qualifying during the 1999 Belgian Grand Prix which he described as "My best-ever crash". His teammate Ricardo Zonta followed Villeneuve by having a similar accident later in practice, leading cartoonist Jim Bamber to show BAR boss Craig Pollock telling Zonta: "Jacques is the quickest through Eau Rouge, so go out there and