It's not strange in that it's got open wheels or drivers from all over the world, that sort of thing is normal. It's not … What's weird is when that circumvention and the rules collide, like they bizarrely did at the 1985 San Marino Grand Prix. … Both drivers Patrick Depailler and Gilles Villeneuve were killed in accidents involving a failure of the ground effect system under their cars, but it took a number of other scary incidents for ground effects to be banned for the 1983 season. …

See more here:
When The Pumps Ran Dry: The Bizarre 1985 San Marino Grand Prix