Near the end of Terry Pratchett’s novel ‘Lords and Ladies’ there is a footnote that is completely irrelevant to the storyline and has nothing to do with plants.
It reads as follows:-
“The Monks of Cool … have a passing out test for a novice. He is taken to a room full of all types of clothing and asked: Yo, my son, which of these is the most stylish thing to wear? And the correct answer is: Hey, whatever I select.”
So really – *that* – a footnote and not always entirely relevant to the main storyline.