This dramatizes the events of a drug trial gone wrong. The film is rather interesting, but at the same time feels somewhat overdone with tropes of horror films. But at the same time it doesn't. If you like it, it's a good film. But if you don't, I can see where you would be annoyed by it. Thud has the feel of a mockumentary, sometimes creating that sense of tropes. Then it moves past that to a tensely plotted film.