a trip down memory lane
when you're so stuck in the past you think you're still in middle school
I saw my old math teacher and instantly said, 'I could still beat you in a math test.' Then I realized I couldn't even do long division.
She started talking about her old crush and said, 'He was cute, but I still think he was a little weird.'
He got a job at his old pizza place and now he's mad at the new employee like it's 2012.