"
to run.
There is research to be done.
On the people who are
still alive.
And believe me I am
still alive.
I'm doing science and I'm
still alive.
I feel fantastic and I'm
At the end of test chamber 19, when GLaDOS attempts to kill Chell by lowering her into an incinerator, she specifically says, "All Aperture technologies remain safely operational up to 4000 degrees Kelvin." As GLaDOS herself is Aperture technology, it can be assumed that she, too, is heat resistant, and did not actually die when thrown into the incinerator by Chell.