Continuity mistake: In the scene where Merrill, Graham and the kids are returning home from town, and Morgan is holding his baby monitor to listen to the aliens, his fingernails are very long. When he gets out and climbs on top of the car to get a better listen, his fingernails are very short. (00:29:55 - 00:32:15)
Signs (2002)
Plot summary
Directed by: M. Night Shyamalan
Starring: Mel Gibson, Joaquin Phoenix, Abigail Breslin, Rory Culkin
Graham Hess and his young son and daughter, Morgan and Bo, struggle to recover from the tragic death of Graham’s wife. A neighbor struck and killed her with his car when he fell asleep at the wheel. Graham’s younger brother, Merrill, has been staying with the family. Devastated and bitter, Graham, a reverend, believes God betrayed him, and he has abandoned his ministry.
Mysterious crop circles appear on the Hess' farm and soon the world over. Alien scouts are spotted, and before long, ships arrive from outer space. With TV and radio their only link to the outside world, the isolated Hess family watch in horror as the alien threat turns into a deadly close encounter. The hostile beings are galactic raiders who harvest planetary life forms. With invasion imminent, the family barricade themselves inside the house. As the aliens are breaking in, they retreat to the cellar.
More mistakes in Signs
Graham Hess: Swing away Merrill. Merrill... swing away.
Trivia: Some of the artwork done by Bo in the film was actually done by Shyamalan's daughter, Salek.
Question: First, let me say that the aliens being affected by only the "contaminants" in the tap water seems to be wrong. Two reason: 1)The Indian vet mentions that they don't like water, and 2) the aliens were avoiding areas with large bodies of water nearby. My question is this: wouldn't humans, who are over half water, be toxic to the aliens? Even if they processed the humans with different equipment and took precautions to avoid blood or body fluids, wouldn't carrying off a sweaty person burn the aliens? Seems like a dangerous harvest.
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Answer: It could be that they are affected by the chlorine in the tap water (humans are affected by chlorine to, just look at Mustard Gas) to a greater extent then humans. The vet is only speculating about the landing sites. And while it is true that humans are mostly water, it is saline (i.e. salty like sweat) and has different chemical properties to pure H2O.
Soylent Purple
Well water does not contain chlorine.