Ah, I didn't think Detroit was that far to Michigan's East, so I just pictured where Michigam was and went straight down from there. My bad.
But then I also found this confusing:
Jeff asnwers "Canada" and is correct... but his friends reply indicates that he misunderstood and got the question wrong.
Going from that and not knowing the exact location of Detroit (without checking a map) you can see why I was confused at how the answer could be Canada.
With how that part is written, it seems like the author made a change earleir and didn't fix this to reflect it. I don't know, but something seems off because of what his friend says.
Either way, like I said before, it's pretty good.