Spoiler
The contestant didn't know, didn't want to guess, and didn't want to trust his MIL's answer by using his Copy, so he walked away with $175K. Jeff played up the issue big time:
Jeff: The correct answer begins with "M".
<Suspenseful pause>
Jeff: Your MIL's answer was Minnesota.
Audience: Ooooooooh!
<Suspenseful pause>
Jeff: But the correct was Maine.
What a surprise!
Spoiler
And after that, I kind of lost interest. I was sorting through my bookshelf for more books to donate to the Friends of the Library. The contestant walked away with $100K or so, IIRC.
Best line during this run came from Nathan.
Jeff: Does it put you under any more pressure, to be helping a real 5th Grade teacher?
Nathan: No, no more pressure than usual. Which isn't much.
WTG, Nathan!