That sucks man. Odds are you've damaged the sensitive mechanisms inside the HD, meaning the disk no longer spins/reads. If you want to test this theory, try doing this. At least this way you can tell if the drive is still readable, and you may be able to recover your data to your PC.
Otherwise, there are people who specialize in recovering data from dead/physically damaged HDD's, but its fairly pricey and probably not worth it.
Or if you yourself are very technically savvy, you could buy the exact same model HDD and carefully swap the interior discs. Although you run the risk of ruining both HD's if you screw it up.
Best of luck