Torn Curtain (1966) - Hitchcock's cameo
From Alfred Hitchcock Wiki
Hitchcock's cameo in Torn Curtain (1966) occurs about 8 minutes into the film.
Hitchcock is sat in the hotel foyer nursing a small child. From the way he holds the child, it would appear that someone might have just had a little accident!
YouTube Video
Film Frames
Selection of film frames of Alfred Hitchcock in Torn Curtain (1966) (click image to view larger version)...