|Stallone's beard was apparently suggested by then-girlfriend Susan Anton, seen here with Warhol, receiving one of Sly's characteristic fake punches to the chin.|
In one scene early on, Deke DaSilva (Stallone) and his partner Fox (Billy Dee Williams) scale a tenement via fire escape in order to make a bust. It's reminiscent of a moment in Serpico in which Pacino uses the same method to enter a building. I've mashed up these two scenes, as the parallels in costuming and physical appearance are rather striking.
The same scene in Serpico also has a shot of Pacino walking down a street and into building, which is similar to a shot in the actor's later vehicle, Cruising, in which he lazily swaggers home to his girlfriend (Karen Allen) after another night out in the Meatpacking District. His appearance is completely different in terms of clothing and hairstyle from that of Serpico, but the mise-en-scene and the actor's movements are nearly identical. In terms of performance, the two scenes reveal an aspect of an actor's bag of tricks--in this case, the way he moves to suit a character and the camera--that is not cited as often as his verbal abilities.