Other mistake: The physics of what happens to the mallet after it hits the ring are completely unrealistic. No matter what the actual composition of red kryptonite contains, there is no way that it could reflect all of the force that was impacted upon it. Clark was also weakened by the green kryptonite. Jonathan's swing of the mallet and Clark's weakened strength would not have allowed him to keep his arm out after being struck by the mallet.
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.
Other mistake: When the Marine officer comes to Whitneys house, he introduces himself as Lt. McNulty, but he is wearing the insignia of a Captain.
