Remember that time when Fred and George repeatedly hit Voldemort in the face with snowballs?
“Christmas was coming. One morning in mid-December, Hogwarts woke to find itself covered in several feet of snow. The lake froze solid and the Weasley twins were punished for bewitching several snowballs so that they followed Quirrell around, bouncing off the back of his turban.” - SS/PS, CH. 12
