Graf stays silent as he wonders what can make that type of noise.
Whoever is up there. I call to you, whatever deity, in my time of need, to help us in the times where we need you. He had never done prayer before, but it seems now is the time to start. He finishes his silent prayer and waits.
Hilbert then begins formulating different scenarios in his head - incoming special forces raid, bombardment, among others.