Hard to say exactly what caused it, I've had this baby for nearly 3 years now and it is still running strong. I used the computer all day long without issue, waking it and sleeping it as I needed it for schoolwork. When I came back home, I plugged it back in to the power, and to my external display. The screen flashed blue, like it always does, and my external turned on and displayed the same color. Then the fun started. The desktop just never came back. I figured what the heck, and hard rebooted it. I got it to the login screen, logged in(both screens are working fantastic at that point) and opened up a quicktime movie, dragged it to the external, and put it in full screen. When I tried pressing play, the computer froze, quicktime quit itself with no error message, and the computer in general became unresponsive. Not a single app would open, not even activity monitor and the finder bar on the top of the screen started flickering, coming and going in about 1 second intervals. I unplugged my external screen, the MBP's screen became blue, with the spinning wheel of death, then just blue, then with the spinning wheel. I eventually said f-it and hard rebooted again. Now I'm typing this wondering what the hell is wrong with my machine.(typing on it as we speak) I'm running all known scripts known to man using Onyx, SMART status checks out, the HD is still fairly new(bought it in june i think). I find this all very weird, help?