Please help me, I've been around and around with this problem. I bought a 15'' Macbook Pro in June 2010, and it has always been weird, having troubles reading some movie files if I moved it around, but everything was fine if it was standing still! A few months ago it started shutting down whenever I pick it up, and I found out that it happens only when I press the back of the computer on the left side, which is really weird! I went to an authorized dealer to repair it and they told me the computer had no problem, that they didn't know what was causing it to shut down and after opening it and cleaning, checking the cables etc. it was just fine. But after 2 weeks it started doing it again!! What should I do? I already bought a 1 TB hard drive just to activate Time Machine, I'm afraid to lose my Mac (I really need it for university!). HELP!