M. Night Shyamalans Signs is one of the most popular horror sci-fi movies but also one of the most divisive due to its water plot hole and one theory solves this problem, but it also makes it worse. Shortly after the success of Unbreakable, Shyamalan returned with Signs, a sci-fi horror movie starring Mel Gibson as former Episcopal priest and now farmer Graham Hess and Joaquin Phoenix as his brother, Merrill Hess, a former baseball player. Graham lived with his son Morgan, daughter Bo, and Merrill, who moved in with them after the death of Grahams wife.
https://screenrant.com/signs-movie-water-plot-hole-theory-explained-worse/