Question: What happens to the lady after the film ends that has her head in the hole? As during the film, she shows she has no morals. In the rest of the movies, you never hear her name mentioned or what happened to her. But surely, with him trapping her and taking the money at the end, it would piss her off enough to want to get the money back and seek revenge on him.
Answer: There's no definitive answer. It's left purposely ambiguous, presumably in case they want to bring the character back in the future. (There is a deleted scene on the Blu-Ray showing the door opening on its own once the countdown hits zero, so presumably she is able to escape.) As for her coming for him... we simply don't know. It's possible she'll show up again in a future film. But you also have to factor in that John has a LOT of evidence on her criminal misdeeds... so he likely could have her arrested and jailed if she comes for him.
Answer: If I'm not mistaken, the room she was in was locked. She may have been able to survive the trap by sticking her head through the opening, but if she has no way of leaving the room, eventually she would starve to death.
Phaneron ★