South Birmingham
At first I thought it was the div next door with his latest sub woofer, the sound was that loud and concentrated, I went out the front and it was empty but still ongoing. It’s caused quite the discussion on local FB pages with theories ranging from a mini quake, to supersonic craft and a sonic boom, to aliens, fracking, and the LHC at CERN and all things in between. Anyone else any the wiser?
Sounds daft I know but it was genuinely surreal and baffling.