Audio problem: Before Flash takes the baby out of the microwave, it makes a ding sound as if the timer had ended, but the microwave is unplugged and not working at all as the scorched screen proves.
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Bruce Wayne: If you were to go into the past, you have no idea what the consequences would be.
Barry Allen: Bruce, I could fix things.
Bruce Wayne: You could also destroy everything.
Trivia: SPOILER: Nicolas Cage has a cameo in this film as an alternate version of Superman fighting a giant spider. This is a nod to the cancelled film "Superman Lives", which would have starred Cage and been directed by Tim Burton. The giant spider was part of the script at the insistence of producer Jon Peters, who finally got to make use of the idea in Wild Wild West.