You might do a double-take upon hearing someone use the word “pop” instead of “soda,” for example, or get totally lost watching someone point out where they are from on the palm of their hand (this will happen a lot, trust me - just nod your head and pretend to know what they are talking about).
If you are coming to the University of Michigan as someone who did not grow up in the state, or even the Midwest, you will undoubtedly be surprised to discover some characteristic regional quirks.