When Hiro Matsushita crashed into the wall on Turn 1 last Saturday (top), the right side of his Lola-Chevy was all but obliterated. Yet Matsushita avoided serious injury because he was seated in the so-called tub, a rigid cocoon around which the rest of the race car is built. The cocoon, introduced in Indy and Formula One cars in the early '60s, is made of composites consisting of aluminum honeycomb and/or carbon fiber. Fire, which used to be a driver's greatest fear, has become a rarity at Indy with advances in fuel storage. The fuel cell, located behind the driver and in front of the engine, is a rubber bladder that is almost impossible to rupture. Matsushita's right thigh was broken in the accident, but thanks to safety advances in Indy Cars, he will return to race another day.