First time IMDb ratings have been so far off from reality

Rating: 1/10 (28 December 2010)

This film is probably the worst film I've ever seen. I've always screened new films by IMDb ratings because on average IMDb ratings are pretty close to what I think of the film (off by +/- 2 stars at worst).
This was the first time in dozens of films where the ratings are so far off. A rating of ~8 on IMDb is relatively rare and indicates a widely popular film. This film was rated 8 and was nowhere near good - I gave this a 1, which I've never done for a film.
Whoever sees this as a 7+ film needs to have their head examined. What a waste of time.
We tried to give the film some time - bearing through the first 30 minutes before finally giving up altogether. There was not a funny part in 30 minutes.