Despite their differences, the one most common thing between McLaren and Ferrari's supercars is their overall construction. Both use the Formula One technology of a carbon fibre monocoque, and both are still the only cars to have done so - probably because this is one of the major ingredients creating their lottery-level price tags. Cost aside, the solution is an ideal one, as it provides the required strength with low weight. Such strength, in fact, that the McLaren F1 became the only car ever to be able to drive away from a crash test at the Motor Industry Research Association. Before this, however, McLaren had proven the monocoque's safety in an improvised test of their own, when the original prototype, the XP1, dramatically crashed in the deserts of Namibia. Despite numerous rolls followed by the car being engulfed in flames, the test driver walked away unharmed.