[Oliver's starting to feel nervous himself. He looks distinctly uncomfortable. He isn't armed. He doesn't know much about defending himself. All of this is still very new to him.]

I'm sorry. I'm still getting used to the whole alien thing. I thought at least here there wouldn't be any dangerous ones.

[The area looks safe enough still, but there's a sound from behind a cluster of trees ahead of them, and now he's been alerted to possible danger... he seems a lot more aware of his surroundings. He looks away from Gwen, startled, to see if it's the missing alien.]