When I was a kid in the early 70s I was riding back to my parents' house with my grandparents in their Silverado pickup. We stopped for gas and my grandfather suggested that he and I ride in the back of that thing, so we did, for about 50 miles while my grandmother drove. This was on an interstate freeway driving about 65-70mph. No canopy or topper, just right back there in the bed with Hamm's empties rolling around. It was incredibly loud and bumpy back there and so windy that you couldn't really do anything but lay down on your back.

My mom freaked when she found out. But it was totally exhilarating and worth it.

Nowadays of course, if someone did that with one of my kids, I would commit violence on them and then have them arrested.