"I'm checking something," he says, quietly. He's not the most graceful climber, but he's proficient.

Enough so that it only take a moment to get close to the point where she found him, and it's there that the vertigo hits. Poe grits his teeth and lowers himself back down, though not far this time. Slowly.

The dizziness fades.

Up again. The world spins.

Down. It steadies.

Poe presses his forehead against the trunk, a rush of heat and then cold rolling through him from head to stomach.

"No, no, no, no, no--" He doesn't realize he's saying it aloud.