Balthazar quietly brings Horvath a cup of tea, then crouches awkwardly to get a bottle of water out of a box behind the counter. It's not refrigerated, but if the temperature doesn't suit the young sorcerer, presumably he can do something about that.

And--oh, look at that, Dave's hit on the worst possible question to ask! In the process of bringing him the water bottle, Balthazar winces. Visibly. "That's a long story, Dave. Let's start with something else. What have you learned so far about interdimensional theory and/or travel?"

He glances over his shoulder at Horvath, silently begging him to attempt to be patient for a moment longer, despite the blow to his nerves and pride.