First off, this should be in Q&A, not general. If you put [Q] in the title, think about where you're posting.
Second, I've had the same thing. Are you using arrrghhh's kernel? What kernel settings do you have set? Are you overclocked/underclocked?
I tried underclocking and it becomes much more frequent. I'm overclocked to 384/max right now to see if it will subside.
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Been overclocked for 2 hours, only one crash/reboot a few minutes after overclocking, none since.
LG G2 - Stock ATT 4.4.2
Atrix HD - Stock ATT 4.1.1