In the scene where Gale, Jennifer and Dewey and a few other people are in Jennifer's house, and they start to get faxes from the killer. When the guy is trying to read the fax that says, "Whoever smells the gas," he uses a lighter because the power went out. It takes a few seconds for the gas to cause an explosion after he sparked the lighter - when in reality - the explosion would have happened IMMEDIATELY when he sparked the lighter - not even giving him enough time to read the fax out loud.