Did we run over something? No. We're up in the air. Then what was that bump? Turbulence. What's that? Bumps in the air. How can the air have bumps? Maybe not bumps. Currents. What are currents? The parts of the air that move. Which parts? The moving parts. Why are they moving? So the plane will go bump. Oh. Bump. Was that turbulence? Yes. Turbulence isn't like a cat is it? ... no. Good. Bump.