Like an old “amnesia” plot on TV.
On Twin Peaks I think Nadine Hurley
gets hit on the head and thinks she’s a
50s-60s era high school student and
tries to romance current high schooler
Mike Nelson. (She’s married, to Big
Ed Hurley)
There’s a TV movie with Jaclyn Smith, based on true events.
She was a housewife, and leaned over to pick something from the kitchen floor. When she stood up she banged her head on something (an open upper cabinet door, I think), and ... POOF! ... she was in high school or college again.