"Under Paris" is one of the worst horror films of all time due to its lack of clear direction and scientific inaccuracies. The plot is a chaotic mix of horror tropes, failing to build suspense or coherence. The film's portrayal of sharks with god-like powers, navigating Paris' underground catacombs, is implausible and defies logic. These sharks exhibit supernatural abilities, further straining believability. The storyline meanders without purpose, failing to establish a compelling narrative or characters. The nonsensical plot twists and poor execution render the film unintentionally comedic rather than terrifying, making it a significant misfire in the horror genre.