9 for the movie? I think the reviewer must be living in a flipped alternate reality where 1 is the top of the rating scale and 10 is the bottom.
It's rated higher than 2001 (4K review) for heavens sake!
I mean, I like the reality where Event Horizon is rated highly. It's a sometimes stylish, sometimes trashy, sometimes nonsense, sometimes terrific bigger budget b-movie that shouldn't work at all, but is, strangely, fantastic in all the right ways. Absolutely love it and can't wait to rewatch it, despite having picked up and watched the 4K DV iTunes version not that long ago.
And you can never compare scores to different reviews by different reviewers. Even scores from the same reviewers aren't mapped out in some kind of giant chart where the four thousand films we've reviewed are cross-checked to verify that they're definitely scored in correlation to one another.
Although, FWIW, I've comfortably watched Event Horizon at least a half a dozen times more than 2001 in my lifetime. It may not be a work of genius from a genius, but it's bloody entertaining.