Well, it typically has much louder fan noises than usual, is very hot to the touch, and you'll hear the HD clicking @ 60 billion RPMs

And then when you ask "What's going on" it will asplode at that exact moment without leaving you a minute to save your work.

*nods* Yep. True story. "Hey.. Be quiet. Do you hear that clicking sound? I think its coming from the..." *PC spontaneously combusts*

lol. Well the laptop didn't sound like that and didn't asplodey so I'll take it as a good sign.