I'd have to say pickup truck purely because of an incident from my (misspent) youth. When I was about 20, a friend of mine had a pick up truck and on more than one occasion gave several of us a lift back from church activities. I am thinking of one particular evening, when he had taken the sides off of his truck, and there were two chairs on the back, rather er, 'insecurely' fixed down! The front seats were full, so another friend and I were sitting in these chairs as we were driven along the road, the main A38 Bristol Road South in Birmingham, a very busy road. Highly illegal, of course, not too mention downright dangerous! Fortunately, we completed the journey without any mishap and, luckily didn't encounter any police officers during the course of the journey either!