You do know that you can plonk down inside a thread wherever you want. You'll have to guess, but say you remember some extremely rare bit of actual wisdom offered by me "last fall", with a little mental math you can guess it's halfway back, and go back halfway.
So for instance, the search window shows this right now for where this post is:
http://cs.finescale.com/fsm/feedback_help_and_testing/f/10/t/160564.aspx?sort=ASC&pi240=3
That "=3" at the end means page 3.
If you are looking at a 50 page thread, highlight the "50" and replace it with "25" then enter.
It'll put you on page 25 which is hopefully within easy walking distance of where you want to be.