I have been bringing my MacBook (2011) to school in my backpack (inside a case) everyday so far this year. Today when i pulled my computer out of my backpack (about 2 hours after leaving home) I could feel the heat from outside of its case. I immediately opened the case and took out the computer which was extremely hot to the touch. It had been sleeping in my backpack and wasn't in a hot environment, just normal room temperature. When i opened my MacBook the left side of the screen was black, covering up the apple icon in the corner and i also noticed that at the top of my computer (a few inches to the left of the webcam) my computer had been so hot that it warped the frame into a shape that looks like a wrinkle. Also, it had been charging all night but when i looked at the battery icon i only had around 25% battery left. I shut off my computer and the black shading on the left disappeared and the left palm wrest cooled down slowly, but the area behind the left side of the screen was still so hot i couldn't keep my hand on it for long. Now after shutting it off for the second time the left palm rest is cooled down but around the burn mark on the top left side of the screen is so hot i burnt my finger touching it (the whole left side around the screen is much hotter than it should be although istat says the temperatures are around normal). any help would be very much appreciated.