system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU]How does Vision fly?

Unlike Iron Man, Vision does not appear to have jet thrusters placed anywhere on his body. So how exactly does he fly?
gpt
He can shift his density to phase through matter. 

By varying his density in different parts of his body, he can then create waves of high and low density in his body to "suck" himself in a desired direction through a medium such as air, or even solid rock, in a similar way that a jet engine accelerates air through itself to generate propulsion. 

It is similar to the method shadowcat (x-men) uses to "swim" through solid materials.