How to create \pagebreak-like command that actually "breaks'' the page?

Question

I want to create a \pagebreak variant that reduces the page (in which the \pagebreak was made) size so that there's NO (besides bottom margin) blank space after the page break. Is that even possible (the output could have pages of different size each)?

Answer 1

After reading the post referenced by GregH I found that pasting the followings line into preamble is almost what I wanted:

\usepackage{everyshi}
\pagestyle{empty}
\textheight500cm
\pdfpageheight500cm
\EveryShipout{\pdfpageheight=\pagetotal
\advance\pdfpageheight by 2in
\advance\pdfpageheight by 2\topmargin
\advance\pdfpageheight by \footskip
\advance\pdfpageheight by \textheight
\advance\pdfpageheight by -\pagegoal}

It seems to work well when \documentclass is article (although I wouldn't use the default \textheight of 500cm), but it doesn't work for amsart: for instance everything between a \[small|med|big]skip and the next \pagebreak is cutted off; moreover, some items on itemize/enumerate environments are also cutted.

So, I guess it might be usefull for some, I'm still looking for a way that at least works with amsart..