Did You Know?

In the establishing shot of the grandmother's cabin, we hear a chorus of peeping in the sound effects mix. These are small frogs often called "spring peepers" and they will usually only sing after sunset, not in the middle of the day as depicted here.
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The motel clerk is wearing glasses only when shown from behind.
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The passenger side window is destroyed when the car hits Harry's truck in the river, yet in all subsequent scenes, it's there.
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Dante's Peak itself occasionally disappears in some brief shots.
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The helicopter crashes into the ground nose-down and continues moving for several feet after impact, which should indicate that the cabin is being crushed; we also see parts flying off the rotor. But a moment later, it rises again in a manner completely unlike the way the wreckage might bounce, more the way it would if was still under power; and we see that the cabin is still intact.
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Cars in front of and behind Harry's truck leading up to the one-lane bridge during the evacuation.
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The blue pickup is hit twice on the freeway onramp.
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While driving around the abandoned town shortly before the volcano erupts, Harry's truck passes the same overturned police car four times.
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The red van that Paul is driving onto the bridge when they are evacuating the town has no vent windows, yet when Paul is stuck on the bridge, and it begins to overturn, the same van that he was driving can be seen to have vent windows.
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When the volcano had started erupting, Harry and Rachel rushed back to her place in his truck to get her kids. The both of them run into her house and she found the letter from the kids. They run back out to the truck and the truck's headlights are on. They're standard headlights, which appear yellow in color. They leave and find the bridge is jammed with traffic and Harry decides to cross the river. In the shot of them crossing the road and going down the bank towards the river, not only are all the truck's lights on - not just the headlights - but they're very bright, white, possibly HID headlights until the truck's demise.
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In one shot we see a realty sign collapse off an office building, however in the previous shot as Harry and Linda are approaching the structure, the sign has already collapsed.
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When the National Guard arrives and Sheriff Turner talks to the Lieutenant, the latter is wearing goggles on his helmet; in the reverse shot however the goggles are gone.
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The blue pick-up has two people in it in the first shots of the freeway on-ramp before its collapse. When it does a few moments later, there is now only a driver inside.
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Cascade Range volcanoes do not typically erupt flowing basaltic (free-flowing) lava. They certainly do not simultaneously erupt pyroclastic and basaltic flows as depicted.
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In one of the scenes, the pick-up truck was trying to outrun the pyroclastic cloud. A pyroclastic cloud moves at 140kmh and could not possibly be outrun by a truck with no tyres.
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After the eruption (following the meeting in the school) we see many broken cables flowing around. In reality, that would have short circuited the town's electrical system and the whole town would have gone dark.
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Incorrectly regarded as goof: " When Harry and Terry are measuring the concentration of sulfur dioxide in the caldera, the instrument probe is protruding out the open cabin door into the helicopter down wash. Sulfur dioxide is more than twice as dense as air; it would be highly unlikely that this technique would provide any meaningful results." The instrument that Harry and Terry are using is a Barrington Correlation Spectrometer (COSPEC), which measures SO2 concentration by comparing the difference in UV spectrum seen by the instrument to a known value. Therefore, the depicted use of the instrument is correct, and is in fact the same way volcanologists measured SO2 levels prior to the Mt. Pinatubo eruption in 1991.
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When they go to save the grandmother, just before the lava comes bursting through the wall, the grandmother has a garbage bag in her hands. When the lava breaks through, she appears to drop the bag and starts running. Then they show the whole family outside, and the bag is back in the grandmother's hands, with no time for her to have picked it up. In fact it was Mayor Wando who dropped her bag; she was standing in front of the grandmother, making it appear that she dropped hers.
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Much is made of the fact that the one-lane bridge and the freeway are the only two ways in and out of Dante's Peak, and that upon the collapse of both, Harry, Rachel and the children are stranded. However only one on-ramp is ever seen to collapse, and despite a section of the freeway collapsing as well, nobody ever checks to see if the off-ramp (and most likely, an off-ramp and on-ramp on the opposite side for the other direction) is still standing and accessible. Even with the small section of freeway down, this is a clear escape route despite potentially traveling on the wrong side of the road for miles.
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After the town hall meeting, people are running past the trophy case when the quake starts. Everything is shaking and falling except the trophies which stay perfectly still in the cabinet.
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When part of the freeway collapses, cars on the section still standing do not move, for no reason.
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When Harry opens the tap in Paul's room the water is instantly dirty. You would expect some clean water until the dirty water runs through the pipe.
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A 1986 Chevrolet Suburban K10 4x4 was used in filming, but the interior shots lack a transfer case selector, and are of a 4x2 Suburban.
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