I am used to it now, and after forty years I still cannot come up with anything better.
"R.I.P. IMDb message boards." - Me, 2017

I love the ending! I remember the first time I watched the film when I was kid, and I was so psyched for the battle scene, and then You just don't see it coming, but they set it up the whole way.

I took it as them saying that they didn't have the budget/resources/inclination to film an epic battle scene. Admittedly, it is a completely odd way to end a movie, and the first time I saw it, I was like, "Wait, what?" However, now it makes me smile at the absurdity. Opinions being what they are, though, I can see where somebody could think it was a lazy way to end a movie.

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"they did not have the funds to film a battle."
Exactly! Plus, it was an original ending, I don't see any problem here.

It ended in typical Python style for the simple reason, they did not have the funds to film a battle. Which in my opinion would have been a bore anyway

I agree. I think it just adds to the comedy

I thought the fact that the film ended with no real conclusion was funny. No big dramatic ended, just random nothingness.

the ending is very weak. but endings never were their strong point.