Other mistake: Krissy's mutant aging reduces her to dust and ash within seconds. Oddly enough, it takes her non-mutant clothing with her. (00:36:45)
Suggested correction: First off, we don't know what gave her powers, there's nothing to indicate a mutation. Second, we see beams of light or heat shooting out of her, indicating she's more than just rapidly ageing like her victims. Her body seems to be burning, turning her and her clothes to ash.