This is, in fact, fussing. I'm a fucking Belmont, I'm not going to get done in by a door.

[ He puts his head on Alucard's arm instead. This is, in fact, becoming a problem. In the immediate aftermath, fueled by adrenaline as he was, it had just been a little dizziness, but on the walk back from Mathias' study he could barely keep himself upright. ]

We don't have to go back in there, now we know what it is.