Startled, Harry whirled, wand starting to drop into his hand, ready to defend himself. A series of possible counter-hexes automatically ran through his head.
The sound of running feet and laugher percolated through his senses. He spotted a group of students running across the quad, throwing random snowballs at random walkers. Harry had been in the wrong place at the wrong time.
A trickle of cold water ran down his back.
"Bloody hell!" Harry swore as the cold water soaked into his sweatshirt. He looked around and realized he was in too open a space to bring out his wand and cast a drying spell. He loved attending the Muggle university, but that put a serious limit on the magic he could do in public. He swore again. It was another fifteen minute walk to anyplace reasonably private. He really needed to work on his wandless charms.
He was cold and miserable by the time he got home. He immediately cast warming and drying charms but he was chilled through.
"Harry?" Severus called.
"Just got hit by a snowball walking across campus," Harry shivered briefly. "Couldn't get warm until now."
Severus smirked. "I think I know how to warm you up."