okay so i was on the computer last night and closed the computer with twitter still up as i went to bed, well when i woke up this morning the computer was going really slow and it gave me enough time to change the wireless connection and then it froze. It wont let me do anything. At first i was pressing the power button and a screen popped up that says, " restart, Sleep, Cancle and Shutdown" but it wont let me press anything to them. I have tried everything like the keyboard shut down, the escape and holding the power button down for 10 secs and so on. I can still hear its running, and the battery is slowly dieing so thats a good thing i think. Also the screen goes black and the only way i can get it to light back up is by holding the power button.. Please help! Its on a Macbook laptop!