Worker learns his lesson when he finds out who the old man he has been pestering really is 

Spilling

Jeffrey smiled cruelly as he poured out the coffee on the floor. The janitor stared at the growing puddle of coffee in confusion. “You forgot a spot there”, Jeffrey said. He took joy in seeing the expression on the elderly man’s face. He had finally released the frustration that had been building up all morning.

He didn’t feel sorry for the old man at all.