Other mistake: Lois digs up Chloe's grave site to unearth her casket. It is obvious that the casket is not buried six feet deep. You would think, with all that is going on, that LuthorCorp would have at least buried the casket deeper to deter inquisitive eyes and maybe throw in a few scattered bones for good measure.
Trivia: In the Episode "Flash" when Clark confronts the Flash in his hotel room, he reads off the fake I.D.'s Jay Garrick, Barry Allen and Wally West. Those are the secret identities of the first three men to be called the Flash. Also, this Flash says his name is Bart, like Bart Allen, the teen hero formerly known as Impulse and currently being called "Kid Flash." (00:10:35)