Worse Than Fingernails on a Chalkboard

Can you think of a sound more spine-tingling or blood-curdling? I can! Grinding your teeth, an activity Davis does with great relish since his top chopper has popped through. I would've thought you needed a few more teeth, but evidently, you only need two opposing ones to elicit this appalling noise. I think he's just testing them out right now, and, as you would expect from baby teeth, they're razor sharp and ready to grind. His fourth tooth is just hours away from cutting through. I can only imagine the grating, grinding volume he'll generate then.