Le Mans 24 hour race

The Le Mans 24 hour race has always intreagued me. How can a race be 24 hours?! Do the drivers never sleep? How come we don't see alot of accidents due to sleepiness? And how do the spectators wait up 24 hours till the race finish? Well, there's actually 3 drivers taking turns to drive so the drivers are not that sleepy i would presume... anyways here's what wiki says about the race:

At a time when Grand Prix racing was the dominant form of motorsport throughout Europe, Le Mans was designed to present a different test. Instead of focusing on the ability of a car company to build the fastest machines, the 24 Hours of Le Mans would instead concentrate on the ability of manufacturers to build sporty yet reliable cars. This encouraged innovation in producing reliable and fuel-efficient vehicles, because the nature of endurance racing requires cars that last the distance and spend as little time in the pits as possible.

At the same time, due to the layout of the Le Mans track, a need was created for cars to have better aerodynamics and stability at high speeds. While this was shared with Grand Prix racing, few tracks in Europe had straights of a length comparable to the Mulsanne. The fact that the road is public and therefore not maintained to the same quality as some permanent racing circuits also put more of a strain on parts, putting greater emphasis on reliability.

The demand for fuel economy created by the oil crisis in the early 1970s led the race organisers to adopt a fuel economy formula known as Group C, in which the amount of fuel each car was allowed to use during the race was limited. Although Group C was abandoned when teams were able to master the fuel formulae, fuel economy was still important to some teams as alternative fuel sources appeared in the early 21st century, attempting to overcome time spent during pit stops.

These technological innovations have had a trickle-down effect, with technology used at Le Mans finding its way into production cars several years later. This has also led to faster and more exotic supercars due to manufacturers wishing to develop faster road cars for the purposes of developing them into even faster GT cars.
Here's a cool video explaining how grueling a Le Mans 24 hour race is:

Apparently, Allen McNish, the guy in the video above was involved in a dramatic crash during the recent e Mans race. looking at a video of the cash it seems mind boggling how he could've survived such a horrific crash. It goes to show the amount of engineering that goes into the saftey of a Le Mans car, specifically an Audi Le Mans car. Check out how the 2 Audi rescue cars add to the dramatic "hero's exit" of Allen Mc Nish from his mangled car... It just says "Look at hows safe and audi car is, and look how fast an Audi car is to the rescue..."... Enjoy the video...