Hollywood Accounting: Eric Idle, on his Exploits Monty Python concert tour at the Turn of the Millennium, noted that this movie was the only Python film made with major studio backing (Universal Pictures)...and thus the only one that apparently didn't turn a profit. So in this tour's version of "The Crimson Permanent Assurance", there's an additional verse about studio accountants.
One of the dinner guests who get taken away by Death is Simon Jones. This is especially uncanny given that the afterlife appears to be some kind of restaurant. And humourously, he plays the husband of Terry Jones.
Throw It In: The line, "Hey, I didn't eat the mousse!" was improvised on the spot.
What Could Have Been: The second verse of "The Galaxy Song" was meant to be an animated sequence along with the instrumental part, but Terry Gilliam opted out of animating it in favour of shooting more of "The Crimson Permanent Assurance".