Yes, it's Triangle. I really enjoyed watching it. One of my friends in university told us he wanted to show us an amazing movie, but didn't tell us anything else about it, which I think made it much better than if I'd known what to expect.
Same! The hallway scene, too. The 'Dodge this' fight, there's so much good stuff in this film. I'm sure you could poke it full of holes if you really wanted to, but how would that be different from any other genre classic that we've come to love through the years?