You are a Vigilante from New York city that uses lethal force on criminals and you have been tracking a shipment of high tier Lazer fire arms throughout the country. Soon enough you track the shipment to Gotham City, in the narrows part of the city.
The shipment arrived at it's meet up between the dealer and the buyer, they pull out the goods then the other gets the money out while you watching them through the scope of a Barrett 50-cal sniper rifle, loaded with H.E rounds.
As you take a deep breath and prepare to Fire, a smoke grenade lands in the middle of the meet up, causing the criminals to cough rapidly. They are soon taken out bye punches and kicks from something covered bye smoke.
You begin to fire rounds at the criminals that are still standing, killing three. As you aim for another one and fire, a flying shuriken shaped like a bat collides with the blade, causing the h.e round to explode mid air.
After that, you proceed to re-center your aim and fire again but the criminal is gone and in his place is a black figure with pointy ears hidden in the smoke, which soon dissipates, revealing the figure to be....THE BAT-MAN HIMSELF.
BAT-MAN throws a batarang at your rifle scope while you aim, causing the lense to crack and break.
Quickly you get up and sprint towards a tight rope that you tied to the other side and slide down towards your battle van but you feel a sharp pain in your arm and rope, it's the bat claw, which BAT-MAN uses to pull you into a punch, knocking you out.
Later.
You wake up in the Bat-mobile passenger seat just in time for BAT-MAN to escort you into Arkham asylum. As Bat-man walks you in, 50 guards train their weapons on and the warning system announces that shoot to kill permissions are granted if you try anything.
The warden orders you to be taken away in hand cuffs and Bat-man speaks quickly.
Bat-man : " Somethings not right warden, I'm going with him. "
And with that batman accompanies you on a long walk to your cell.