That plain black mask is the one Angel had pinned to his face before Connor had made it his personal teething ring, then tossed it out onto the dancefloor in a fit when his father tried to put him down in the stroller. He'd lost track of it, having not cared enough to go searching through the dancers to find where it landed and is surprised to see it on Faith's face.

"Didn't get the breakout memo, either. I thought weren't going to go the cheating route with this one."

It was true; Faith could very easily get herself out of prison if she wanted to. If Angel were from a few years down the line, he'd know just how easily when it took her a handful of minutes to bust out of there with Wesley in tow. But for now, he's baffled.