My head is exploding with scat. And I’m not talking about animal feces. I sure hope that my head wouldn’t be exploding with that. Clearly, if this were the case, I’d be having an altogether different set of problems. Nope, what I’m talking about when I talk about scat is vocal improvisation. Yeah, that God knows this is not the first time I’ve written about scat. Scat is many things to me. It is the hip dude leaning up against the bar. It’s also a…