when Aidan is rubbing oil on Lindsay's shoulder, you can see stripes of oil on her forehead. However it isn't until the next shot that Aidan actually rubs the oil on her forehead.
The scene where they run into the woods is clearly shot in day-for-night mode. You can see shadows and spots of sunlight, as if it was filmed in the middle of the day and then darkened.
Lindsey attempts suicide on the dock by wrapping a rope around her neck and pulling on both ends. In reality the obstruction of the carotid artery would stop blood flow to the brain and she would lose consciousness before she would have been able to kill herself.
When Claire suggests that Sean and Natalie killed themselves in a suicide pact "like Romeo & Juliet", Lindsay states that "Juliet drank poison, she didn't jam scissors into her neck." Juliet faked her death, pretending she drank poison. Romeo really did drink the poison (thinking Juliet dead); when he died, Juliet stabbed herself with his dagger.