AppleScript Hanging?

Hi all,
I seem to have an AppleScript that is hanging, and I can't figure out how to quit it. I tried the force quit, but it doesn't appear in the list of applications. It was activated when I was compressing a pdf using the print command yesterday. I let it go overnight, but the Applescript icon is still spinning in the uppertoolbar (near my battery indicator etc). If I move my mouse over it I just get a spinning beach ball.
Any ideas? I've looked around but I don't know anything about scripting so I have no clue what's happening.
Running OS X on a MBP, C2D.
Thanks all!