In the final scene, I was watching the totem intently, and while I was hoping they weren't setting it up to be the "duuuude, it's a dream", it sure came across like that. But I saw the wobble as well, so I'm going to take it as that it was real. Reading the other tidbits in this thread was great.
Although I do question the ending bit with Limbo Ken and Limbo Leo - when Ken reached for the gun, what was he supposed to be doing? I thought that was a key that it was going to shoot Leo, to put him into "real" Limbo (because he wasn't really in limbo, was he? Since he didn't "die" while under sedation?) rather than ...
Aw fuck, now I'm confusing myself trying to ask my question.
How did Leo get them both out of Limbo? Did he have to come up with another kick somehow to get them back? Who was still round in the other levels to bring Leo back?
And while I'm asking questions - what was supposed to have happened to someone in Limbo? In the real world, would they just have been carted off to the loony bin in a straightjacket or something? They kept saying how your mind is lost in Limbo, but ... hmm.
I was completely delighted by the varying levels of the scenes, and oh man, there were a lot of visuals that just had me grinning. Loved, loved, LOVED the scene where Page's character realizes she can play with physics. Also loved the music at the end.