Corrected entry: The lava flowing through the Red Line train tunnel was under very high pressure. Why didn't it erupt out of the access shaft that they used to lower the camera down into the tunnel, and for that matter, out of all the other access shafts as well?
Corrected entry: When the lava is flowing down the streets, all the glass in the buildings shatter. At that heat, the gas would melt not shatter. The temperature that is used to melt and mould glass is a lot less than the temp of the lava flow.
Correction: The glass is shattering from the shock of the sudden air temperature change. It would be unlikely to melt instantly unless it was much closer to the lava.
Corrected entry: When Anne Heche and Tommy Lee Jones are hanging on the fire ladder above the lava stream, the fire hose on the ladder starts to burn. Why not Tommy's and Anne's clothes? They are even closer to the lava than the hose.
Correction: One of the firefighters was moving the ladder to Tommy and Anne, when it got caught in a fire (I think it was from a car) that's why the hose was on fire, and the ladder was beginning to melt and bend.
Corrected entry: When they are trying to stop the lava from flowing down the street, they make a "U" shape in the street with the cement highway dividers. If they had laid the dividers the other way, they would have supported themselves, and not need the trucks behind to hold them.
Correction: It doesn't matter. They would have used the trucks to hold off the lava anyway. It was a good idea. By the way, the barricade can be made anyway they wanted to build it. Besides, it was safer to build it the way they did.
Corrected entry: When the co-star Anne Heche goes to check out the flow of the lava in the red line tunnel she goes to a payphone and calls Tommy Lee Jones' cellphone but his cell phone burned up in his car. The phone she calls him on is a phone that he took from a news reporter. So how did she get his number to call him.
Correction: Mike changed the number on the cell phone to his number, wrote it down on paper, and gave it to Amy in case of another emergency.
Correction: The point at which the lava finally erupted was the end of the tunnel. Listen to Tommy Lee Jones and Anne Heche's dialogue as they're racing back to the hospital.