What does "bad altitude" mean in this joke?

A: The airplane was sent to his room for what reason?
B: Bad altitude.

Could anyone explain this joke? What does "bad altitude" in this context mean?

Thank you

Question

What does "bad altitude" mean in this joke?

A: The airplane was sent to his room for what reason? 
B: Bad altitude.

Could anyone explain this joke? What does "bad altitude" in this context mean?

Thank you

Answer

It's a play on words. The joke is that "altitude" sounds like "attitude." Sometimes people might say that a person has a "bad attitude." "Altitude" is the height at which a plane is flying above the Earth's surface below it.

Answer

The pun is a wordplay. In theory, a child would be sent to their room for their "bad attitude".