Susan stepped up to the dais, looking around nervously to see
whom she would be facing.

"Anyone else?" asked Flitwick.

Pansy shot a look of pure hatred towards Susan.

"I will."

The duel was tense, the participants sweating as they moved to
counter each other's hexes.

Suddenly Susan found herself on the floor, Snape sneering at her.  She
tried to sit up but collapsed, overcome by nausea.

"Do pay attention, Miss Bones.  Even the third years know that the
Shield Charm is no use against Bewitched Sleep."

Behind him stood Pansy.

"Keep your hands off him," she said, and left.