After...

The film starts out well, with urban explorers doing their thing. They film their exploits and post them to a web site, gaining fame and friends along the way.

Then they go on a trip to Moscow and things go haywire. It's a good movie up to that point, but when the surrealism starts the fun is all over. You can't tell what is really happening, what parts are just surrealism, and what is just some kind of flashback. That spoils the whole intent of the movie - if you don't know what's going on, it's hard to enjoy.

It's not a bad movie, and I liked watching it, but the whole thing was spoiled for me by the repeated flashbacks, people coming back to life, people disappearing, walls fluctuating, etc. I lost the thread of what was really happening at that point, and so stopped caring.

In a lot of ways it reminds me of Primer, another movie that was good but somewhat hard to keep track of.