Predictably, I'd suggest
The Grateful Dead Movie (1977)
I keenly remember a trip from my much younger years, i.e. the statute of limitations is long gone, which means, BTW, I'm going to be able to tell a lot more fun stories on Bluelight since my return. But anyway, I had gone out to a remote rural cabin to deliver some goods to this really degenerate family of rednecks, this is in really rural (as in may as well be in Kentucky) upstate New York, the recipients consisted of the paterfamilias, who was on disability due to brain damage sustained in some kind of snowmobiling accident, and his two young kids who he nonetheless shared his drugs with, really weird, fucked up scene. My ride was this neo-Nazi skinhead I knew through a friend, pretty cool guy and I wasn't about judging people by their ideology or their scene. So it was this really weird set of people, only thing we had in common was a shared love of hard drugs and acid. So after fixing, we all dropped a bit, and agreed to trade off on the soundtrack, first was some heavy metal from the residents, then some white power music from my ride, none of which was doing too good for my state of mind. I took a little Valium, and before I knew it, it was my turn, and I put this move on, and it was smooth sailing 'till morning. Then we found ourselves snowed in ... and the fun continued. Oh, to be young and country again. And wherever I go, whatever may happen in life, I will always love the Grateful Dead.