'The whole eight-eighths!!!'
To me, this is the funniest scene in the whole movie. When Jeff takes Tony into the men's washroom for a little pep talk and manages to turn him into a raving maniac. The way Fred Astaire stomps stiffly around while jerking his arms and gesturing wildly while shouting his lines just makes me laugh every single time. You can tell how unfamiliar Tony is with this over-the-top stuff, so different from his normal suave, laid-back demeanour. And everyone around reacts with shock and disbelief at this outrageous hamminess, while Jeff pours on the praise - you can see this disaster of a show coming a mile away.
Flat, drab passion meanders across the screen!