Snape was wearing a deadly scowl.

The Weasley twins had managed to melt the pewter cauldron they were sharing.

“10 points off Gryffindor!” growled Snape. “How many times do I have to say? Beetle eyes before dragon liver. Clean up all this mess!”

“He looks a lot like a thin, dried up elephant.” murmured Fred under his breath when Snape turned to his back. “I would very much like to give him two giant elephant ears.”

When the bell rang, the twins jumped up and knocked bottles all over the floor, and sprinted towards the door.

Snape now looked murderous.