Here's a video clip filmed on Bolivia's Yungas Road, also known as 'Death Road'. I don't think it's really all that scary, because I've covered many miles on mountain roads in the Kingdom of Lesotho. The Maloti Mountains (part of the larger Drakensberg chain) are just as steep, the trails just as narrow, and the hazards just as deadly.
And here's what can happen if the driver misjudges a turn . . .