Americans are crazy. They have this fascination with throwing their shoes on stage. I've been to a lot of shows in me life, some good and some bad. But I was never moved to take off me shoes and throw it at the lead singer.
I think it comes from really liking literary forms. Poetry is very beautiful, but the space on the page can be as affecting as where the text is. Like when Miles Davis doesn't play, it has a poignancy to it.

