The fatal accident of Dave MacDonald and Eddie Sachs in the 1964 Indy 500. On the second lap of the race, Dave MacDonald lost control of his car in turn 4 and slammed into the inside wall, causing his gas tank to rupture and the car to burst into flames. The car slid back across the track into the path of Eddie Sachs, who slammed head on into MacDonald's car and caused his car to begin to burn as well. Sachs died while still in the car, though whether it be from smoke inhalation or the severe burns is unknown. MacDonald was actually awake following the incident, but with over 75% of his body burned and massive smoke damage to his lungs, he died two hours after being transported to Methodist Hospital.