 Complete the following phrase:  His second Formula One race was the 1960 Belgian Grand Prix, held at the extremely fast and dangerous Spa-Francorchamps circuit; there, he got a taste of reality when two fatal accidents occurred Chris Bristow and Alan Stacey. Clark was later quoted as saying in a 1964 interview: I was driving scared stiff pretty much all through the race, even though he finished 5th and scored his first points finish. The next year, Clark was involved in one of the worst accidents in the history of Formula 1 racing. In the 