LOLs, Didn't know it ... In a 2008 interview, Ringo Starr remembered it as "the worst session ever" and "the worst track we ever had to record".[6][7]
[...]
In 1994, McCartney said that the song epitomises the downfalls of life, being "my analogy for when something goes wrong out of the blue, as it so often does, as I was beginning to find out at that time in my life. I wanted something symbolic of that, so to me it was some fictitious character called Maxwell with a silver hammer. I don't know why it was silver, it just sounded better than Maxwell's hammer."[5]