A powerful clue that the flashback is in Felix's mind not Oscar's is that the furniture destroying device is identical in current time as it is in the flashback and Oscar presumably never saw it before. He would have imagined it differently. Comely Barbara Rhodes makes her second appearance on OC in this. She could be being remembered by Felix for his mental prohibition flashback from the time he and Oscar went to a doctor's for therapy and she was there. Thus she only really played one actual character!