these vids clearly prove that nobody gave a sh*t about safety for spectators or riders in the 80's lol. look at that hill climb in the 2nd vid, while its probably less than a 15 foot elevation hillclimb its got 2 rediculously huge rocks with a nice trench between them perfect for getting your rear tires stuck in, its a recipe for rolling the quad back on top of you.
and in almost every video the bikes / quads tank through at least 3 feet of water, one guys honda fell on its side and the only part of the bike you could see was the end of his handlebar the rest was completely submerged.
these races were probably a great way to get mud inside every moving part of your bike and fill your exhaust with water lol.
i also love how the spectators disregard their own safety to help riders get over hillclimbs and stuff, you figure the track designers would realise the track is a little too nuts when nobody makes it up the small hills even WITH the entire crowd grabbing and the bike and helping pull them up the hills rofl. its a team effort to make sure nobody gets hurt and it looks like it backfired.