It's called a music orgasm, and it starts in your spine. Right as that chord fits into place, you can feel the tingling start- with volume it creeps up, and with the rockin high brass glisses barely audible through the lower foundation, it shoots right to the top of your back until you're forced to shiver and your jaw drops. Ten extra points for overtones :-)
Nightbeat was amazing. Even without the marching (it was standstill due to rain) it was... it was... ack. I can't even begin to describe. I want to march with the Blue Devils sooo badly, or maybe Seattle Cascades! *shivers*
I can't wait.