Knew it was no pipe bomb. It was way too loud to be a pipe bomb.
Pipe does come in a wide variety of sizes.
I think you're correct, it was too loud for a pipe bomb. At least one that I would think could be carried easily. I'm no explosives expert, and what explosives I have ever used was limited to those shot off aircraft onto targets miles away. You don't hear/feel those go off. But as you know this was a deep felt boom. It also sounded to me like a big trash dumpster being rattled at the same time. Guess that was all the loose stuff within the blast radius resonating from the shock wave.