Why is there so much time spent at Circuit de la Sarthe testing ahead of the 24 Hours of Le Mans? To avoid messy driver changes, for one. Getting in and out of the little trapdoors that go inside a top-level LMP1-class Le Mans prototype is harder than it looks.
At least Marcel Fässler of the No. 7 Audi R18 rolled out of it this flop pretty quickly. Speed is of the essence, even in the pits.