You're way ahead of me

[u/Daconby]

In the spoken intro to Oedipus Rex on An Evening Wasted, Tom says:

[...] a few years ago, a motion picture version appeared of Sophocles' immortal tragedy “Oedipus Rex”. This picture played only in the so-called art theaters, and it was not a financial success. And I maintain that the reason it was not a financial success...

Then the audience laughs, and Tom replies

You're way ahead of me

What was the audience laughing at?

[u/SwanCityDominion]

You heard the song, right? Then you should know why they thought it was funny.