The dialog spoken into the mirror resembles Bickle's from Taxi Driver which was released three years later. The disco dancing resembles Travoltas Character in Saturday Night Fever which was released five years later
The bizarre-looking car next to the Mercedes-Benz 240 D, driven by Clark, is Citroën Ami 6 Berlina (in production from 1961 to 1978). Ami was the first car to have rectangle-shaped headlamps, which became common a few years later.