#2 - Hail Storm Chaos, Britain 1975
Two years after the Scheckter pile-up, Silverstone saw another huge crash, but this time it was thanks to some freak British weather. With a few laps remaining, Emerson Fittipaldi foresaw the rain storm and changed to wet weather tyres, but he was one of the few to do so and those who didn't, didn't stand of chance of staying on the road.
Heavy rain, strong winds and hail soon drenched the Silverstone circuit, causing Pace, Hunt, Scheckter, Mass, Watson, Depailler and more all aquaplaned off in scenes that would be replicated in 2007 at the Nurburgring, but not on this scale.
The drivers that were classified second through to fifth didn't actually cross the line and Fittipaldi was the only man to finish on the lead lap. Thirteen drivers in total were caught up in the melee, and this likely would've been more if the race ran to full distance. Like the previous crashes, nobody was seriously hurt, which was a minor miracle in this era of motorsport.