There was a double fataility in F1 many years ago that happened sort of like Massa's crash.
A corner worker was running across the track to get to a car that had a small fire going. He was carrying a metal fire extinguisher. As he crossed the track two cars came around the corner at full speed. The first car missed him but the second car hit him straight on. The corner worker was instantly killed, his body was basically instantly turned into a pile of meat. They couldn't even recognize him from what was left. The fire extinguisher he carried struck the driver in his helmet, killing him as well.