movies in 3s

no long ago we (brother & i) did a re-watch of the first two mummy movies from the late '90s.

the first is better than the second & the second is better than the third.
which is true for a lot of movies where there was 3 of them. the first x-men movies & jurassic park movies come to mind. the only ones to break this rule are the original star wars movies, where the second was the better one. & the back to the future movies, where the first one was good and the two that followed were equally just ok.