So in this episode it’s just accepted that Potsie attacked a girl and tried to rip her dress off?

I remember that episode. Richie was asked by Howard to entertain the daughter of a hardware client Winnie McKinney but he had a date so Potsie took his place. There was a funny scene where Fonzie entered the picture and Winnie thought he was Potsie. Fonzie responded with an "Aaaaaay!"