Re: Al, Severus?
If Snape was surprised to find Al wandering the corridors wearing an Invisibility Cloak - and probably not terribly much else - then Al's words widened his eyes in a rare show of visible startlement.
"Come on," he murmured, seized by the realisation that - since he'd already taken his leave of the gathering in the Hall - he likely wouldn't be missed. "Let's continue this conversation somewhere warmer than a draughty corridor." He held out his hand in an offer of a sidealong.