If sudden loud noises trigger panic attacks, I highly recommend you avoid the following link.
www.youtube.com/watch?v=HVJGh51wR7kStarts off quite subtle (a thought or feeling) that gradually gets more prevalent until my body kicks into high gear. Suddenly, thoughts and feelings come and go rapidly, like the cacophony this track builds to. It's got a general rhythm, but is otherwise an organised mess.
I was on the bus home from therapy on Friday and this song came on my personal music player, and it just clicked into place.