The top mistakes in Black Christmas http://www.moviemistakes.com/film6414 en Sat, 29 Nov 2008 06:55:29 +0000 121398 A boom mike is visible at the top of the screen in one of the alternate endings where a mortitionist comes to get the body of Billy from the coroner. 121792 At the end, while Billy chases Kelli, Kelli knocks over a cart of surgery supplies, spilling the material forward. However, a few shots later, Billy is shown picking a scalpel up from the small tin pale, which slid ahead of Kelli. So how could Billy have picked up the scalpel if he was behind Kelli?