With the way Wayne is looking at the Mask, I get the feeling of deep thought. Remembering all that he has been through. Or one of those small moments of self doubt where he asks him self if he is truly making a difference.
two versions could be stated about this. Once comes from a episode of a batman series of the late 90's where batman and batgirl had to fight one, and he kept it as a trophy, or from a comic where Dick Grayson wanted to keep it as a pet.
that i never really figured out. It was either before my time in the comics since I got into batman somewhat late in my life seeing as how i mainly read only GL comics and such, or i never saw the episode i was refering to of the series.