I had the pleasure to sneak into the Stennis Space Center at Bay St Louis , Mississippi where they make the space shuttle engines. They build them there and ship them by barge to Cape Kennedy but before they ship they test fire them on the barge. I was less than a quarter of a mile away , man talk about loud. We didn't have any ear plugs either.... And the low end was awesome.. Trey I think I drove my 72 bus there from New Orleans where I was living at the time (Bus content)