Screen went black, would not respond, fans revved up full.

hey,
My iMac just went wobbly.
The screen was black and the fans were going at full blast. I had to hold the power button down to get it to turn off. It seems fine now. But it did this earlier in the week too.
Now I know that no matter how good a computer is, it is still bound to crash once in a while. But I was just wondering if this particularly 'violent' crash is at all common among you guys or if I should worry about it...

Sounds like a classic case of kernel panic.IF you have installed any hacks or programs with kernel extensions you may try removing them one at a time to find the offender. If not you may try repairing permissions with Disk Utility and optionally booting from the install dvd, opening Disk Utility and running a disk repair on your startup volume as disk error are also a source of kernel panics.

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