Something in the Water

He peered around the Great Hall with mounting uneasiness.

Fred and George were sitting straight-backed, eating without conversing, while their younger brother was competing with Neville in who could transfigure Trevor into the most attractive teapot.

Harry had slumped over his dinner plate as if dead, and nobody was paying him the slightest bit of attention.

Draco Malfoy was openly appraising Miss Granger.

It was at this precise moment that Snape hurriedly lowered his goblet, suddenly convinced that there was something in the water.