Dumplings
Bai Ling plays a totally ageless character, but how does she stay so young? Well, it takes a pretty ginormous secret. Here's a hint, our main character loves eating dumplings that she makes herself, and the audience isn't really sure what's inside of them. Maybe that's the secret to her youth?
Wolf Creek
Greg McLean directed this 2005 horror thriller following three off-roading Aussies who come across a friendly local with malicious intentions. What the characters originally thought was just an innocent hike ends up with them being stuck in a Texas Chainsaw Massacre type situation. That, and they don't know who they're out in the wilderness with.