There's no reason to sound quite so surprised, you know! This place is quite fascinating and if I had the choice, I'd return here!

[If only because he gets the feeling Chell is going to do something horrible back home within the next five seconds...]

Shame I got sent home, but that's not important now! I'm back and prepared to continue our experiments! Ah, but what have you been up to? What sorts of new things have you discovered since we last spoke?