Teach you a good lesson in reason

"They...are all ghosts!" After the middle-aged man finished speaking, he looked at Alexander expectantly, hoping to see a look of panic and fear on his face.

"Oh!" Alexander nodded.

That's it? 

The middle-aged man was stunned. He thought that Alexander did not understand, so he continued: "Think about it, which normal person would run around in a terrifying world, and they are all ghosts because their feet aren't touching the ground!"

Alexander nodded: "Oh!"

The corner of the middle-aged man's mouth twitched violently, he continued: "Did you notice, the moment they boarded the bus, they stared at you. This is the last bus instance! 

Haven't you seen how miserable the girl was who was targeted by the middle-aged woman? There are three ghosts! You only have two arms for them to take, what if they want your head?"

Alexander still nodded, as if he agreed very much, but still said the perfunctory word: "Oh!"