Visible crew/equipment: At the time when they get lost and stumble back to the river and the log, and Heather says "No, it can't be the same log", look across the river. There is someone standing there clad in white, and all three of them are standing on the same side of the river...
Factual error: A girl is playing with a Tamagotchi virtual pet in the scene set in 1994, but the toy was not released in Japan until 1996 (it wasn't officially available in the USA until May 1997).
Heather Donahue: I just want to apologize to Josh's mom, and Mike's mom, and my mom. I am so sorry! Because it was my fault. I was the one who brought them here. I was the one that said "keep going south." I was the one who said that we were not lost. It was my fault, because it was my project. I am so scared! I don't know what's out there. We are going to die out here! I am so scared!
Trivia: The first time they filmed the part with Josh's teeth and flannel in the sticks, the directors had left it outside the tent, not telling Heather. When she got up in the morning, she picked up the bundle of sticks and threw them off to the side without looking at it. They had to contact her and re-shoot it.
Answer: It is Mike. If you remember from earlier in the movie it was said that one person was made to stand in the corner while the other person was killed.
Tallicame