"Yeah -- the problems of being a rare car," Dee sighs, then smiles again. "Thanks a lot, guys! Hopefully I won't need any of them for a while, but it's good to have them."

"Very good," Doc agrees. "I'd say something about using another's credit card, but -- it's Aperture." You don't really complain about these things with the just-this-side-of-evil laboratory.