Another example of what happens when creative people are given to much free time to play around to alleviate the boredom.
Here, from Twitter posts by @CuriousBritishTelly, are the opening credits to Saturday Night Fever overdubbed with the theme tune to Steptoe & Son and Rocky training on the streets of Philadelphia over the theme tune The Good Life.
Can your locked-down, furloughed or otherwise under-stimulated imagination come up with a combination to match this?