I just opened my backpack to find my macbook had been on and running for the last hour. The CPU temperature must have been pretty close to 90c, the laptop itsel

I just opened my backpack to find my macbook had been on and running for the last hour. The CPU temperature must have been pretty close to 90c, the laptop itself was too hot to hold. Somehow it still works, thanks to the giant unibody heatsink, I guess. Today's lesson: Don't change your bluetooth mouse batteries after putting your laptop in your backpack, unless you want it to wake up and potentially start a fire.