Most people know by now that actor and famously cool guy Bill Murray visited with the University of Louisville men's basketball team earlier this week.

Murray's son, Luke, is an assistant coach and Murray enjoys watching his boy work. He will almost certainly attend some games this season at the KFC Yum Center.

Read more:Please, Louisville, don't screw up this sweet deal with Bill Murray

But he also celebrated Halloween in Louisville, hanging out at Luke's house and answering the door Tuesday night when trick-or-treaters came by. Try to imagine all of the very unimpressed children wondering why their moms and dads were suddenly freaking out.

This gem comes from Christi Mack, wife of Louisville head coach Chris Mack and a veteran of Murray encounters. She said the secret to getting along with Bill is to just be cool. Don't shout out lines from his movies or demand selfies.

See also:It happened! Bill Murray met with the Louisville basketball team

Chris Mack's secretary was charged with picking Murray up at the airport and called Christi for advice, as she had never chauffeured this generation's greatest comedic actor.

"I said, 'Just talk about normal stuff. Just talk about Luke and Louisville basketball. Don't bring up any movies,'" Mack said. "He's super nice and you can imagine that part of him probably just wants some type of normal."

Mack said that Murray will absolutely be at some home games.

"Louisville will get to see him a lot," she said.

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Jeffrey Lee Puckett: 502-582-4160; jpuckett@courierjournal.com; Twitter: @JLeePuckett. Support strong local journalism by subscribing today: courier-journal.com/jeffreyl.