All the "bomb" speculation on here is funny.
IMHO as a Air Force weapons technician for 21 years, having loaded Nuc's to .50 cal and most weapons in between on B-52G's, A-10's and F-16C's, this Nashville event was a bunch of diesel and fertilizer packed in an RV. Nothing I have seen on here has proved to me other wise. What makes it spoopy is the location and how the event played out. The gun shots have not been explained. My guess is the dead guy was iced before explosion… or he did the shots to get police to clear area before he killed himself. I have doubts about that part.