That's what the back button is for...
Although honestly, the lack of paging is disturbing. If nothing else it's a massive waste of server bandwidth when the threads go over 150 replies. If this were my site, paging would be first priority on my list of improvements to be made and programatically,
unless this site does something funky with the way it draws screens, it's basically just a few simple changes in the SQL query isn't it? You've already got paging for the thread display in every category (although honestly, I don't like the way that's implemented
either. Maybe it's a tradition Web 1.0 point of view but a Next Page button is a lot more useful to me than a Show More button.)