[Endurance racing in a nutshell. If you're around for a full 24-hour race, you're going to work in sleep whenever you can, whereever you can. Here's an Audi mechanic passing out like a boss at the 2002 24 Hours of Le Mans. Photo credit: Ker Robertson/Getty Images]

[Uh oh, somebody raced a blue Prodrive Ferrari 550. I will never sleep again. This was at Le Mans 2003. This car finished fifth in class, though a different Prodrive 550 won the class. Photo Credit: Getty]

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