Jenson Button on guard for Belgian test
The legendary Eau Rouge represents a different challenge to the 24 drivers on the grid for Sunday's Belgian Grand Prix around Spa as they will have up to 150 kilos worth of fuel on board. That makes the uphill left-right sweep an even more hair-raising proposition than normal, particularly if running side-by-side with a rival.
Due to the weight there is a serious risk of bottoming out, the car losing grip and with it increasing the chance of a collision should there be a duel through the corner where speeds can hit 180mph.
"With 140 to 150 kilos in the tank it's going to be pretty tough, really tricky," said Button. "We need to make sure people know where the edge of the circuit is because you're going to get a lot of people trying to go straight.
"They'll be thinking it won't get noticed because it's a massive benefit, so we need to make that clear to (FIA race director) Charlie Whiting beforehand, which I will do.
"The first lap is pretty manic anyway, with a wide start but then it narrows up at turn one. It will be F1's version of chicken going through there."