Need help with Finder EMERGENCY

I was ejecting a camera, and I got the Spinning Wheel of Death. So, being the moron I am, I force quit Finder. Now, Finder won't open. I click it's dock icon, and I get "The application Finder.app can't be opened. -10810" as a dialog. I tried to open Terminal to halt, and Terminal closed my window and can't be re-opened, leaving my dock frozen and non-functional (I have "magnify" enabled on my dock, and the Terminal icon is still enlarged with it's name above it; I can't click icons). So basically, I'm left with no Finder, no Terminal, no Dock, no Menubar (no clue why), and a connected hard drive with very important data on it, so I'm not going to risk massive consequences by removing the battery. Basically, how can I properly eject a hard disk without Terminal, Finder or the Dock (therefore, no applications folder). My only open non-daemon applications running are Safari (with a window already open, leaving me able to post this, thank god) and Terminal (frozen and inoperable). I have no remote command-line access. HELP!!!

EDIT: Just remembered, thanks to QuickSilver triggers, I have access to Activity Monitor, Xcode, and Notational Velocity (Not sure how that would help)

 

Thanks for the quick reply, but I have a connected hard disk with important data on it. I can't loose it, unless it's loosing data or loosing my computer because it stayed on forever

 

but doesn't un-ejected disconnecting of a hard drive threaten data loss? And I can't do an actual reboot, I need to remove the battery, which I'm 100% positive won't eject.

 

Ok, thanks

 

Just did that, it worked fine and no data loss. Thanks for the help!