Story doesn't sound right, much easier, less disgusting ways to get a buzz.
How high do you think you'd get huffing methane? from my admittedly very limited understanding of chemistry that's what they would be getting from the concoction.
"But it does me no injury for my neighbour to say there are twenty gods, or no god. It neither picks my pocket nor breaks my leg." - Thomas Jefferson, Notes on the State of Virginia, 1782
Arguing with a truck driver is like wrestling with a pig in mud, eventually you realize the pig enjoys it.