Dave White, Frank Sinatra's stand-in for over 30 years, can be glimpsed in an uncredited cameo as the stagehand who gives Sinatra, Peter Lawford and Buddy Lester temporary refuge from their pursuers right after the burlesque club brawl.
In a scene between Danny (Frank Sinatra) and Adele (Patrice Wymore), Adele throws a dish of candy at Danny. The throwing of the dish was ad-libbed, which accounts for the genuine look of surprise on Sinatra's face and the faces of his co-stars.
While ten-pin bowling, Josh lights up and starts smoking. When we move to a close up, the cigarette and smoke have disappeared, and the guy next to him has suddenly moved right next to him. When we shoot back, Josh is smoking again and sitting on his own.
Danny and Tony are casing the Sands and sit down at the lunch counter beside an attractive woman in the white dress and stole. The blue water pitcher on a saucer in front of the woman suddenly turns into a basket of dinner rolls between camera shots.