Some questions: bomb liquid, and cash/credit (SPOILERS)
Why did the CIA guys say she was using credit when she had conspicuously switched to cash in the previous scene?
What was the little bottle of liquid on the side of the bomb? Why did it not blow up when he turned the ignition? I know the engine hadn't caught yet, but the wiring was done in the steering column so that should not matter. And how did Darby figure out there was a bomb as he was starting the car? She seemed to have a sixth sense earlier in the elevator too.
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