The police sirens sounded like wind getting knocked out of our stomachs

The police sirens sounded like wind

getting knocked out of our stomachs.

We tried to find a place to pull over

where there was a semblance of light.

There was no light.

They asked us to step out of the car.

I didn't know why—they grabbed him

like he wasn't somebody's child,

palmed the back of his head

like a fruit ready to be dropped

from the top of the roof so the other boys

could laugh at the plurality of pieces.

There was no sovereignty left in his limbs.

His face against the front of the police

car made him look like a fish out of water.

                 But where is the water?

                 When has there ever been water?

                 When have we ever been allowed to swim?

                 When has there ever been somewhere  

                                   we can breathe?

I don't remember the last time police

sirens didn't feel like gasping for air.

I don't remember what it means not

to be considered something meant

to flounder, to flap against

the surface while others watch you

until the flailing                stops.

For lines(22-24) what is the poetic device being used in the poem and what is the meaning behind the message he was conveying in this quote. "I don't remember the last time police sirens didn't feel like gasping for air. I don't remember what it means not to be considered something meant to flounder, to flap against the surface while others watch you until the flailing stops"