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ARIADNE: Do you use a timer?
ARTHUR: No, I have to judge it myself. Once you're all asleep in room 528, I wait 'til Yusuf starts his kick...
ARIADNE: How will you know?
ARTHUR: His music warns me it's coming, then the van hitting the barrier of the bridge should be unmistakable-that's when I blow the floor out from underneath us and we get a nice synchronized kick. Too soon, and we won't get pulled out; too late and I won't be able to drop us.
ARIADNE: Why not?
ARTHUR: The van will be in free fall. I can't drop us without gravity.
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