There's not exactly the scene when she said that, but anyway, I think that there isn't any quote better for a creepy picture of GLaDOS like that.
Maybe this is the GLaDOS that Chell saw when tries to beat her in Portal 2. Don't know, anyway, I really WANTED to portrait GLaDOS like a really mad android.
GLaDOS design by me inspired in all the portal fanartists ♥
Drawing by hand, color at SAI and effects in Photoshop.
Hope you like it!