Siouxsie has a feline grace from the wildness in her eyes to the way she paces about the stage, tossing her jet black mane, moving around in circles like a caged jungle cat. She was in full command of everything on the stage.
In truth, Yoko Ono has a vast and somewhat unnerving back-catalogue. Some of it ("Cut Piece") demonstrates real genius, while other pieces (many of the arty statements she makes on Twitter, for example) can feel a tad trite and vacuous. But in the presence of the work itself, much of it performance art that can only be experienced in the moment, one feels somewhat overwhelmed.