MotoGP - British 500cc GP - Silverstone Race 1 - 1983.

This race was stopped after six laps,when swiss rider Peter Huber (suzuki No46),at race speed ran into the rear of touring Irish rider Norman Brown (suzuki No42) at stowe corner. Both riders died instantly.Crossed oil flag and caution flag were displayed,which meant race was stopped, which the British riders recognised as stop.But the American riders were not familiar with this flag display,because in America a red flag was displayed at Marshal points for a race to be stopped,which now happens at any racing event across the World.I was standing at Club corner and witnessed this crash,it was horrific,both riders lost their helmets.The race was rerun two hours later as a aggregate race which Kenny Roberts won overall.