SPOILER AHEAD Question about scene at the lake
MAJOR SPOILER AHEAD!
I love this movie, but one brief scene that mystifies me is the last scene at the lake. This is the last scene in which we see Bianca "alive". Actually, it's the last scene we see her at all. Gus and Karin are off in the distance and notice Lars and Bianca in the water. It's clear there's trouble.
My question is: why are they in the water? Did Lars think that some cold water might revive her somehow? Is Bianca supposed to have "drowned"? But why would they try to wade or swim when it was winter time? I'm just wondering.