“Jake!” I started to complain, but I fell silent when I realized that his whole body was quivering with anger. He glared at me wildly, a growling sound building in his chest. I froze in place, too shocked to remember how to move. The shaking rolled through him, getting faster, until it looked like he was vibrating. His shape blurred.… And then Jacob gritted his teeth together, and the growling stopped. He squeezed his eyes tight in concentration; the quivering slowed until only his hands were shaking.
