Daphne wailed in mortification and reached a hand for the door, in an attempt to hold it shut against her brother-in-law. But her palm slipped and in a terrible misjudgment of timing, the glass door was nudged open right into Draco's forehead, clocking him. The Malfoy heir roared and swore, staggering backwards in a kind of loping tap-dance before going down with a crash.