The charges going off make a deceptively quiet sound: muffled whumping sounds, one after another. It's the ominous creaking of metal that really catches one's attention. Marc doesn't look back, he just makes sure Layla is ahead of him and still running before trying to pick up speed.

But he's laughing a little, too. They did it. The creaking, while getting further away, is getting louder, and then there's a tremendous crash. They're too far away to hear any shouts of alarm.