Kill Switch by Penelope Douglas

Ready and… I tapped Winter’s right leg twice.
She pulled the ring from a smoke grenade and rolled it out
of her right hand just like a bowling ball. It tumbled across the
street, green smoke pouring out of it as it hit the curb.
People shouted excitedly as towers of smoke billowed into
the air, creating a fog. If there were any kids around, at least, it
was non-toxic.
“I did it?” she asked in my ear.
“Perfect.”
I wished she could see it. I raced over to the left and
screeched to a stop, tapping her left leg as I felt her dig another
out already.
She pulled the ring, and rolled one out of her left hand, it
falling under a car, purple smoke drifting up out from
underneath.
We took off again, and I could hear her laughing as I
swerved side to side, firing up the crowd. I noticed the cops
watching patiently, wondering how far they were going to let
us take this.
I heard a guy from the sidewalk yell. “Paintballs?!”
I looked over to see him with a big red splotch on the chest
of his gray sweater.
He pointed, laughing. “I’m gonna get you, Rika! I know
that was you!”
I laughed.
We raced, setting off more grenades as Lev and David
worked the drones flying overhead, which they’d disguised as
reapers with skulls and black robes attached to them as they
flew around the square, buzzing people.
We had everyone’s attention, the clouds of smoke dusting
the air and blurring views.
I tapped her left thigh.