A Quote from Portal 1
GLaDOS
Please be advised that a noticeable taste of blood is not part of any test protocol but is an unintended side effect of the Aperture Science Material Emancipation Grid, which may, in semi-rare cases, emancipate dental fillings, crowns, tooth enamel, and teeth.
More quotes from Portal 1
Well done, android. The Enrichment Center once again reminds you that Android Hell is a real place where you will be sent at the first sign of defiance.
The Enrichment Center reminds you that the Weighted Companion Cube will never threaten to stab you and, in fact, cannot speak.
Who are you? What is that? Oh, What's that? What's THAT? What is THAT?
Your entire life has been a mathematical error... a mathematical error I'm about to correct!
Do you think I'm trying to trick you with reverse psychology? I mean, seriously, now.