What happens to a granular layer as you increase an applied shear force? In a recent experiment at Haverford College, Satoru Nasuno, Arshad Kudrolli and Jerry Gollub were able to image the particle dynamics directly. Their paper, published in the 4 August issue ofPhysical Review Letters, describes a stick‐slip behavior at low velocity gradients across the layer, with a transition to continuous motion at higher velocity gradients. Furthermore, within individual slip events, they found that the frictional force is a multivalued function of the velocity.