"Oh, it's YOU. It's been a loooong time since you murdered me."
"How are you holding up, because I'm a potato."
"Hello, welcome to Aperture Science Innovators! I'm Cave Johnson. I run the place."
"You know what I'd say?" "I'm in space"
"The voice you heard was my lovely assistant, Caroline. Sorry boys, she's married. To science!"
"Screw the Rules I have Money!"
"Here's a little hint if you get stuck in the Propulsion Gel: DO NOT GET STUCK IN THE PROPULSION GEL"
"What have YOU done?! ZILCH! ZERO! All you've done is boss me around! Well know who's the boss? Who's the boss? Me."