Many years ago, while in my teens, I worked at a hydro power station. Or, to be precise, in the store place that was, while building the power station. That store place was a big unit. I guess 30 feet to the ceiling. Further more, I worked in the part of the store that was not heated, there was no need for it to be as different stuff for machines, trucks and so on were kept there. The cold store, as it was called, hade a huge double door, so you could drive a truck into it. The doors were made in sheet metal. In cold winter days, these doors made a "clanging" sound - like thunder - when you closed them fast, and hard. I love that sound. And that is the sound I hear while listening to your bass on this tune. Love it!