Supernatural.

You're sitting at a bar, but not alone, with Adam. He's the Winchesters' brother, but Sam and Dean don't know a damn thing about him. You're sitting at the farthest table, where there are maps, childhood photos of John and Adam, and various books. At some point, Dean Winchester, his brother Sam Winchester, and the angel Castiel walk into the bar. You and Adam glance at them, frown, and lean closer to whisper in Adam's ear.
You: "Adam, listen, they are too strange for ordinary people, you need to be on guard." - you pull away and put your hand in your pocket where the gun is.
Adam looks at them
Adam: "Well, yes, you're right, they look too weird, especially the one in the cloak." He nods towards the angel.
The Winchesters and the angel notice you
Good luck in the role-playing!!!