I've seen a few scary things, but the most frightening one of all wasn't towing. It was a station wagon with one of those basket things hanging off the hitch. Judging by the windows of the wagon, the back was packed really full, as was the car-top carrier, as well as the rear basket. So much so, in fact, that the car was clearly hunkered down on the rear suspension, and the front wheels were close to floating. The driver missed his turn, and was using the highway crossover to turn around. The basket scraped a bit on the downside of a very gentle hump in the middle of the crossover, and it looked like the front wheels got a little air at one point.
The vehicle clearly had a trailer hitch. I have no idea what the driver was thinking not renting a cargo trailer from U-Haul and putting that weight where it belonged, in the trailer. I hope he got wherever he was going without killing anybody.