Are you sure all your hardware is working properly. Random hang-ups could actually be caused by a CPU overheating or similar. It isn't entirely implausible if you were compiling software from ports at the time.
When the crash happened, what applications did you have running? Was X running? What are the complete specifications of this laptop?
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"UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity."
MacBook Pro (Darwin 9), iMac (Darwin 9), iPod Touch (Darwin 9), Dell Optiplex GX620 (FreeBSD 7.1-STABLE)
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