It is very important to keep that base of your notebooks ventilated. Plonk it on a soft pillow and play flash games for long hours and what you get is grilll.. That's exactly what a girl who plays a lot of flash games did .. :P .
The thing to remember is that even though some processors like the intel atom are capable of operating at 100 deg C ! the other things may not be . In this case the thin keyboard somehow got all the heat and fried !! .
you can keep a watch on the core temperature using something like this :
Also its good practice to us a frequency governor and keep the processor on "power save" unless you really need the extra cycles.