1 Host: Er... Don't rush. Maybe you should review your answer. Talk through the options. Take your time.
2 Nigerian Finance Minister: Really? Well, let's see then. A penny saved...
2 Nigerian Finance Bureaucrat: <cough>
3 Nigerian Finance Minister: Ah, you know, as silly as it sounds, maybe that's right...
3 Host: Locked in, and correct for $100!
4 Host: And my job saved too. We've never had anyone get the $100 question wrong before.
4 Nigerian Finance Minister: Silly sayings; they never reflect reality.

I don't know if this is the case with international versions of this show, but in the Australian version, it's so screamingly obvious that the host is trying to help the contestant pick the right answer. They always immediately lock in the correct answer, but if the contestant tries to pick a wrong one, they always launch into the "are you sure?" routine. It's intriguing how this is not obvious to the contestants themselves.

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2023-02-04 Rerun commentary: I think this quiz host would make a good Gomez Addams figure. I don't know how easy it would be to make figures for the rest of his family though.