Where I traversed a stretch of gravel with a Porsche Cayenne. Nothing too dramatic but the car felt like it was going to shake itself to pieces at anything above 60 km/h. Mechanical sympathy would not allow you to go faster. The next year I was picked up by someone with a Patrol and taken across the same stretch of gravel. I was vexed because I felt we would have been so much faster over ice instead but the driver insisted. And lo and behold, the thing cruised at between 110 and 130 km/h over the same stretch and felt like a flying carpet. Truly one of the memorable drives / rides of my life ππ»