I saw a sketch many years ago about a man who forgot to trim his nostril hair. I don’t think it was Monty Python, but I’m not certain. I’m sure it was not the SNL sketch about the man who ran a nostril hair trimming stand. IIRC there was no dialogue. I’m not certain about that.
In the sketch, a man forgets to trim his nostril hair. He gets on a bus (?) and his nostril hair is growing rapidly. Eventually it looks like a moustache. I think it got so long that he pulled it up and wore it on his head.
Ring any bells?