He was almost done. There were only two or three more measurements to be done. A few more drops here and there and it would be perfected. Why did she always choose these very specific times to interrupt him. Whatever it was, could not possibly be as important as what was before him. He added a few droplets as he heard her footsteps approaching loudly. Aggressively. Then he leaned over to the piece of paper sitting next to all the little vials and scribbled something.
"What the hell do you want, woman?" he muttered under his breath. She'd be there soon enough. Maybe. Maybe he could get another ingredient added before she got there, not that he was going to rush. You could not rush a solution. That usually lead to disaster. That's when he realized he was missing something. He looked around the table to see that the ingredient he wished to add next was not before him. He surmised he could let her in.
Just as she grew close enough, possibly about to open the door, he pulled it open. "Yes. Good. Where are my blue fangs?"