Great story about Mario, Spaw, although I can't quite remember some of the details..

Anyway he was testing at a road circuit in the States (Laguna Seca?) where turn five could sometimes be flat but other times not. So he goes out and on his second lap the guys in the pit hear his engine suddenly stop. They all pile into a vehicle and drive round the track until they find a trail of bits of car leading off the road. They look around and down the bank is Mario, standing by the side of what used to be his car, examining the remains of his wristwatch.

He looks up and calmly says, "tell you what guys, turn five ain't flat today"!

F1 World Champion in 1978.