Panels 1-3: Heather runs through the doorway (here, she clips her gun back to its holster). She turns left along a catwalk. She stalls.

Panel 4: She sees herself, as before on the floor below, back inside the moon base.

Panel 5: She runs again.

Her own voice calls out from below: W-WAIT!

Panel 6: She pushes open another door with full force.

Panel 7: The world on the other side is broken, in floating pieces. It’s bits of the sealed tunnels she visited prior.