The deliberate pacing doesn't quite pay off because the payoff itself isn't substantial enough. While the gore, visions, and aquatic beast are effectively presented, they appear too quickly to leave a strong impression. Iron Lung suggests an expansive and profound story, but the final reveal feels rushed, lacking in suspense and offering only a short view of the creature. It amounts to two hours spent generating anxiety that culminates in a violent yet disappointing resolution.

Source on TMDB