**Your comments and/or constructive criticism will be well appreciated!
Chapter 1: Flash
My body was getting heavier with every passing second. Confused and terrified, I was pinned down onto the cold, rocky pavement. And I felt my legs starting to go numb. I needed to move. I needed to get out of here. But most importantly, I needed to see Emma again.
Slowly, I twisted myself around, pulling myself up along the car that I had been leaning against, smearing traces of my bloody fingers over its pale blue paint. I craned my neck until I could see through the car’s window, and into the parking lot.
There was no one in sight, but I knew that I wasn’t alone. It was dangerous, but this looked like the opportunity I’d been waiting for. If there was any chance that I would get out of here alive, that I would be able to hold Emma in my arms just one more time, this was it.
I heaved myself up, maintaining a crouching position, and glanced out at the parking lot a second time. My breath was bated, and my ribs were throbbing with pain, as I hung onto the car’s side-view mirror, ready to move at any moment. And I saw my reflection; my messy brown hair, flattened and plastered all over my forehead by blood and sweat. And my dreary, blue eyes stared back at me in awe, and I could feel them asking, “Why couldn’t you just move on?”
But I knew why. And Emma needed to know, too.
So I made a move; I ran out of my hiding place, between the cars, and stumbled into the midst of the parking lot. I know, it was highly impulsive, and I could have gotten myself killed...but why not, if all I was doing was sitting around and waiting to die, anyway?
I quickly dived into the next row of vehicles. Back hunched, my legs shuffled in every direction as I tried to figure out which way to go. I poked my head above the cars a couple of times, looking frantically for the enemy.
And then I caught a glimpse of his bald head, several cars away, behind a mini-van. I ducked before he could see me, and squatted beside another car.
I was so close to escaping, and I needed to move quickly; I could see him walking in my direction, gun in hand, through the polished black coating of the protruding sedan before me.
To my right, just meters from my position, was David’s cruiser. The door was still wide open, the back window was blown out, and the engine was still running. And to my left, I could see that the gunman was getting closer; my time was running out...
And in that split second, I made the decision to run for it.
I grunted, summoning the strength of every last fibre in my exhausted leg muscles, and bolted toward the car. Only a few half-seconds later did I begin to hear the violent flapping of the armed man’s trench coat, and the frightening thump of his boots on cement, as he gave chase.
With ever stride, I subconsciously estimated the distance to David’s car.
Five...four...three...two...one...BANG!
I shouted in horror as I felt the bullet slice through my left leg, and the excruciating pain that followed flared up and around the wound. I came crashing to the ground, within inches of the car.
I managed to heave myself back onto my feet by clinging onto the car's open door. Tears of pain, anger, and regret poured from my eyes, faster than the blood from my wound.
“Give it to me.” the gunman said, monotonously, and lowered his weapon.
I was about to die, and I still didn’t fully understand the reason.
“Jared...” he raised his voice, threateningly.
“No!” I spat, my back pressed against the cruiser. He was going to kill me, anyway.
He glared at me for a moment, taken aback by my courage in the face of death. But I had already accepted my fate: I would die protecting Emma. So I stared right back...trembling, sweating, bleeding.
And then suddenly, raising his gun at my chest, he smirked, “Typical.”
Petrified, I helplessly gazed down the abysmal barrel of his weapon as his finger coiled around the trigger.
I thought that my entire life would flash before my eyes. But it didn’t. I only saw her again...I mean, I saw us...I saw everything that we’d been through...
Between the echoing of the gunman’s last words and the roaring gunshot, my entire life for the past seven weeks flashed before my eyes...
On to the review: 
I'll try to use 'and' more sparingly from now on. Also, I changed 'awe' because it definitely doesn't work, now that I think about it. About the 'few half-seconds': When I saw this scene in my mind, I somehow felt that saying 'a few seconds' made the gunman's reaction seem slower than what I wanted it to seem like (moreover, I felt that 'a few seconds' would allow the MC character to get too far away). That might just be me, though, so I'll probably change it. 
I think I might change it, however, as I have some new ideas. Also, who ever said the main character is killed? He might, though...or maybe not...we'll see... 
However, having planned every (important) chapter of the story already, I hope this will be different