Conversational tone of Statement of Purpose Essay
Don't do it.  A statement of purpose is an opportunity to demonstrate your formal writing abilities.  Jokes like this make it sound like you are not taking the application seriously.  (And I don't really think this one is funny, anyway.)

Also, be concise and to the point.  I don't see how the name of the town where you moved, nor the number of miles between it and your university, has any relevance to your application - people who are reading large numbers of such statements really don't want to spend time on unnecessary text.  Stick to information about what you have accomplished and how you believe it is relevant to your preparation for graduate study.

You can certainly highlight the fact that you graduated from this university, and perhaps mention any particular aspects of it that make it a good fit for you.  But you can do that in a serious and professional tone.