You can tell when you have crossed the state line between Missouri and Oklahoma with your eyes closed. The bumps are a dead giveaway.
Agree. The drop off at state line is your first clue.
Remember that song about Small town Saturday night? “... tells Lucy the world ain’t round. It drops off sharp at the edge of town.”?
Take hope though, people in Kansas think things are better in Oklahoma. Probably better than New Mexico as well. At least people here are sort of conservative.