system
Given the following post, respond as if you're commenting on Reddit:
human
[Superman] Why does seeing what might be a bird or a plane cause people in a giant city full of metahumans to freak out?

"Oh my god its a bird in the sky or maybe a plane or maybe that guy who is in the newpapers all the time"
gpt
It's multiple people talking.

Person 1, excitedly: "What's that in the sky?!"  
Person 2, dismissively: "It's a bird"  
Person 3, dismissively: "It's a plane"  
Person 1, excitedly: "No! It's Superman!"

They're excited about seeing Superman. "It's a bird/plane" is people telling the original guy to calm down so they can go about their day.