Quick question - shortcut to turn off mac when completely frozen?

I'm not talking about force quiting - I mean when everything is jammed and the only option is to turn the power off. I'm sure there is a shortcut for this - similar to the one for the pram reset something like applealt+pr but different letters?

Roger Wilmut1 wrote:
...your only recourse is usually a forced shutdown by holding the power button.
After which you should really restart from the install disk and run a Disk Repair from Disk Utility: every time I get a freeze I do this (in fact I run Applejack which is quicker) and it almost always shows up some error which needs repairing.
yes, that's a very good point.

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