I was holding off on asking this because I was afraid of spoiling the ending, so anyone who hasn't seen it yet probably shouldn't read this post.
In the scene where Ennis calls Jake's wife, and she's telling him about Jake's death, there are flashback-type things of Jake being beaten to death. When I saw it, I was thinking that this was Ennis imagining things, but I talked to a friend who saw it twice...he said the first time, he thought that, too, but the second time he said it was obvious that that was what really happened to Jake, and that his wife was making up a story. Did anyone else get that impression?