Samuel George Davis Jr is given free rein to ad-lib away as he shot an entire campaign for Suntory Whisky. In this ad he scats as he pours himself a drink and stops, raising his hand - WAIT! - to taste a sip. When you are a cool cat like Sammy Davis Jr, you can make all that an ad.
This campaign was prominently shortlisted and awarded gold in Cannes Lions 1974.