Freaking will saves.
EDIT: To add some great GLaDOS quotes for fun.
“…the appropriate chamber for this testing sequence is currently unavailable. It has been replaced with a live-fire course for military androids.”
[When you escape the incineration chamber.]"Time out for a second, that wasn't supposed to happen."
"Place the device on the ground, then lie on your stomach with your arms at your sides. ... Assume the 'Party Escort Submission Position' or you will miss the party."
“Uh-oh. Somebody cut the cake. I told them to wait for you, but they cut it anyway. There is still some left, if you hurry back.”
“I’m not kidding now. Turn back or
I will kill you.”
“I’m going to
kill you, and all the cake is
gone.”
“That’s it, I’m done reasoning with you. Starting now, there’s going to be a lot less conversation and a lot more
killing."[/incineration_chamber]
