what do i do when a torrent is stuck?

what do i do when a torrent is stuck. i know its not seeded and everyone who had tried to dl it is stuck at 84%. is there anything i can do to finish it. or do i need to find another torrent (there arnt any).

>>10
Not 5 but BitComet and uTorrent on the PC side and Transmission on the Mac side (nightly builds).

>>9
But it's a hash -- if you're simplying brute forcing a hash match, you're going to run into hash collisions and generate blocks that match the hash but isn't the correct data.  Better off to just hunt down the seeder and point a gun to his head and ask hiim to reseed.