He sees you when you're sleeping. He knows when you're awake. He knows that you've been bad and haven't been cleaning him properly before your morning coffee, and therefore Black Death is not very happy with you right now. Hence why the coffee maker is hiding and shooting beans at whoever dares to get too close.
She was too familiar with the angry noises that started up right before bad things happened. So once Black Death started growling unhappily, she let out a string of curse words before sliding under the kitchen table and flipping it over to make a shield for herself. The one time she forgets to clean him before she started making coffee, he overreacts.
“T’e ‘ell is wrong wit’ ya’ t’day?!” Mack yelled over the commotion of coffee beans ricocheting off of the surrounding area. She’d assume the other bots in the room were growing rather impatient as well.
“’m sorry I f’rgot t’clean ya’! But compared t’ot’ers- ‘m innocent!” The blonde pleaded, trying to beg for mercy.