I'm doing a lot of editing with FCP X and occasionally it seems like the system gets overtaxed. I've gotten the spinning wheel while the screen freezes (although I'll keep hearing what I was watching). Then, after a short wait, I get logged out. It goes to the log-in screen when I boot up. What is this? I don't get a message about a kernel panic but it seems in that vein. Thoughts? Do I need to do something different to my computer?