Is it normal for a Macbook Pro to be extremely hot underneith? I mean, I had a 13" Core2Duo model and that never got hot whatsoever. Now I have a 15" i5 model and it gets extremely hot (to where it almost hurts to touch) on the bottom, more towards the bottom front where the hinge/screen is. It gets extremely hot without even doing anything, it gets extremely hot just on start-up of the machine itself while it still has the apple logo and is turning on and such. I'm not sure if this is normal, but aside that, I'm not sure if this is a problem either. Input?