You could hear the HDD "wanting" to start but failing. I searched the net like crazy because I really needed the data kinda badly: I even considered trying to find an identical, used (but working), HDD and swapping the controller.
Eventually I found a message (somewhere on Usenet I think) saying that some failing drive may start when cold enough... So I did put the HDD in the fridge. After the 2nd try I managed to boot it and to copy all my data and it's the last time that that drive booted!
So, as crazy as it sounds, the fridge/refrigerator trick was working in some cases... And I take it that the grill/heat thinggy may work in some cases too :)
You could also hold the drive in your hand and rotate it in a jerking fashion to try to unstick it. I remember doing that successfully a few times.
I have a Seagate HDD in the freezer for 2 years now. Every method of recovery I've used has been unsuccessful. I'm waiting to send it into a recovery service, and $1500+ that I haven't got lying around.
Good times.
I'd hate to lose my personal photos. I'm glad that Apple came out with Time Machine, because I now have backup religion; not only time machine backups but offsite CCC backups.