Unmistakable signs of illness.
Soon, she heard the unmistakable sound of a helo nearing.
The door opened, and she heard the unmistakable sound of a gun being cocked as they entered.
When Jonny's hand clamped around her arm again, she felt the unmistakable sense of Traveling.
The unmistakable snap of wires reached them, and the helicopter tilted.
In the distance, she heard the familiar, unmistakable sound of an explosion.