Meredith Voiceover: When there's a poisonous snake in our path, we freeze. When we smell smoke, we run. When faced with danger, fear takes over and we react, desperate to feel safe. It's biological, primal. But for someone who suffers from trauma, it's the everyday things: a touch of a hand, a song in a coffee shop, the smell of rubbing alcohol -- ...Seemingly random, common things convincing your brain and body you're in danger, and there's no way out...