btoth said:It's called a kernel panic. Usually a hardware-related crash. (Also, kinda like a good-looking "blue screen of death" if you've used Windows.)
What model computer is it? If it's a new computer, you might look into returning it for a new one. Otherwise have you changed any settings or installed any new software lately?
Cheryl said:What do you have plugged in to it in the way of devices. An old set of speakers, or floppy drive will cause the panic.
Run Disk Utility on your permissions, then get MacJanitor and run it. Fixed up my G5 real quick!notdarwin said:it seems to lock up and gets kind of gray and pulls up this power button looking thing on the screen and is like you need to reboot your computer its pertty random