A Little Taste of It
Producer Roy Thomas Baker spoke about how Mercury once played the opening ballad section on the piano for him, before going out to dinner. He nonchalantly played the piece perhaps not realizing that this one piece of music will eventually be a major hit in the history of music.
Source: fandom.com
He said: “He played the beginning on the piano, then stopped and said, ‘And this is where the opera section comes in!’ Then we went out to eat dinner.” Maybe Baker had an idea that it would be something in the future.