Sally instantly regretted not putting a shield charm around herself (well sort of). She had to admit, despite being friends with Astoria, she never though Slytherins were capable of a good time. And yet, here she was, having fun.
After running away from the snowball only to have it follow her, she just sighed and stopped letting it hit her. There was really point in exhausting herself trying to escape something she knew would hit her. Sally did, however, take a second to stick her tongue out at John. It was a good thing she was convinced she should've been in Slytherin, it meant she didn't mind the colors so much.
Sally stopped down and put her wand back in her sock. These things really were more fun the muggle way, and she had a good arm for throwing. She quickly made another perfect snowball and chucked it at John, laughing as it him in the face.