Sawyer and Juliet shoot two hostiles, save Amy

The group hears two gun shots and a woman screaming. They go check it out and find two natives/hostiles/others holding a gun on Amy. Her husband Paul is lying dead on the ground. It seems that Paul and Amy were having a picnic when the hostiles arrived. They put a bag over Amy's head. Miles says to Daniel, "We don't get involved, right?" Daniel replies "It doesn't matter what we do. Whatever happened, happened. Sawyer and Juliet go to save Amy. Juliet shoots the short haired other and Sawyer shoots the long haired one. Sawyer removes the bag from Amy's head and she asks "Who are you?"

"Whatever happened, happened" is another intriguing line from Daniel Faraday. He is a bit out of it right now, so it's hard to know what to believe though. He seems to think he can change something by not telling Charlotte that she will die if she comes back to the island, but they says "Whatever happened, happened." Charlotte's death happened so presumably that can't change, can it?

Also, it would seem that the hostiles/others have had a thing for putting bags over people's heads for a while. This scene was reminiscent of when Kate was captured by Tom and the others.