At the beginning of the end to Amsterdam in Coldplay Live 2003, Jonny has a little tuner-sized piece of equipment that he holds over his pickups to create a feedback effect without strumming. Then again, that all might be a lie, because I have never seen that kind of equipment before and i don't know what it is called or where to find it? Could anyone help me out? I'm bugging all of my friends about Jonny's "Little Black Box" and they're going to kill me soon if I don't find out. Thanks.