In the legendary comedy 'Some Like It Hot,' Jack Lemmon plays a jazz musician who must disguise himself as a woman. His instrument in the film is the double bass (or upright bass). Unlike many actors who simply mimic the motions, Lemmon—who was a talented pianist in real life—took professional lessons to learn how to properly pluck the strings and hold the massive instrument. This dedication ensured that the 'musical' scenes felt authentic, allowing the audience to fully buy into the character's professional background. The physical comedy of Lemmon struggling with the huge bass while wearing high heels became a highlight of the film. It shows that even in a broad comedy, a movie legend's commitment to the 'instrument' is vital for grounding the character's reality and elevating the legend of the performance.