or
The woman slips a packet of poison into the coat pocket of the other person. They will accidently infect themselves the next time they reach in for a tissue to wipe their nose.
As they part ways, he realizes his wallet is gone.
The car, unbeknownst to him, is stolen. When he drives away, she calls the police to report that she saw it.
He feels only a pinprick, and dismisses it. She smiles as his eyes lose focus and he falls to the floor. When he wakes up, he is in a hut in Rwanda during the genocide.
...-- Do the math. [ Parent ]