I kind of get #4. You go almost anywhere in this country and you let them know you're from Kansas they'll do the same tired ass joke, "You're not in Kansas anymore!" DUR DUR DUR!!!!! Never heard that one before and btw it's WE'RE NOT IN KANSAS ANYMORE, so if you're not from Kansas or have recently been in Kansas your joke is pathetic and doesn't make sense.
. When I moved out to Pennsylvania and Boston they'd always pull that crap with the same goofy grin on their face as almost to say, "I'm so clever."