Top Gear goes racing with AC/DC's Brian Johnson

Let's rewind a few hours. It's 4pm, and Brian's about to be lashed into the cockpit of a racing car. He'll point it down the pit lane, sweep round a left-hander and pop out into one of the most fighty races in the world, the 24 Hours of Daytona.

Think of it as Le Mans with an American twist: twice around the clock, an assorted mix of cars, some of the planet's top drivers, all on a 3.5-mile circuit made up of a tricky infield section, plus three sides of the speedway's steep oval banking where the top cars - Daytona Prototypes like Brian's - will be doing 200mph. As you'll have figured out, the DPs are pretty much made for this place.