Actually-[But before Damian can correct Grayson's theory, the noise reaches him as well and he moves after the other boy, waiting patiently for him to jimmy the window open. A few seconds later has them climbing up and out of the building, Damian following after and landing soundlessly beside Grayson. Only when they're both out of earshot does Damian begin speaking again.]

My coming here was not deliberate, however...fortuitous it was. There was an incident while I was out on patrol. I sought you out because...[And he trails off, not knowing how to finish that thought. He'd sought Grayson out because it would be more difficult to have this conversation with Batman. (And there was also perhaps a more sentimental motivation.) He is not inclined to share either of those reasons.]

...[Quietly.] I did not expect you to know me.