Context: It was not immediate , but after a few minutes of him gazing and rhythmically wiping the window free of the fog his own warm breath caused , a familiar face , or rather , profile , walked past . Recognising him , Masuda tapped on the glass lightly with only the pads of his fingers . This however was enough to catch the person 's attention , as they looked up , gazed around confusedly for a moment before their gaze found the eyes of Masuda .
Question: What may happen after the person notices who it is ?
Option 0: None of the above choices .
Option 1: They smile .
Option 2: They wave for the to go away .
Option 3: They give them a mean look .
Answer: 1