Do your famous disappearing act.

Year: ~1970
Artist: Henry "Hank" Syverson
 
In the 1960-70s, Hank Syverson worked as an illustrator at J. Walter Thompson supporting various accounts, including Pan Am. In the late 1960s, he produced whimsical art for a series of ads which became the "GO" campaign.  Some of the ads were produced as posters in various sizes including 12 x 19, 21 x 22 and 28 x 48.
 
In this poster, the reader is prompted to use Pan Am to disappear.