This will "Blow You Away"

The idea I thought up when i got home.

The Hitman, assembling his weapons and gadgets in the abandoned apartment building. Once the rifle is assembled he looks through the scope to get a better idea of his surroundings. Looking at details, cars on the road, people walking past etc.

Moves the sights near the doorway to a motel room where a fat sleazy man is receiving a pizza delivery. The man snatches the pizza from the small boys hands and slams the door in his face. The boy upset and not paid for the pizza starts to cry, walks slowly away, gets on his small moped and leaves. The Hitman glances at his laptop, conforming one last time that the target is this very man.

The target now sitting in his arm chair eating his pizza. The Hitman at this time has a clear shot at the man through the window of the motel room. Just squeezing the trigger, a van pulls up outside and blocks the window. Time has passed and the van hasn't budged. The Hitman now frustrated, has to go to street level to deal with the target.

The target inside is just about to cook (more) food and turns the gas on. The Hitman knocks on the door, surprising the target, forcing him to leaving what hes doing to check who's at the door. He sees him through the spy hole in the door and takes cover behind a chair. The Hitman realising hes not opening up, gets even more angry now, and lights a cigarette to ease his stress.

Pacing up and down outside he decides to give up and call it a day. Flicking the cigarette behind him and walks off toward camera. The cigarette has bounced off a wall and into an open window.
The cigarette causes the entire room to explode. The Hitman, standing still, so surprised, turns to the camera and walks off with a smirk on his face.

* It looks alot in writing but it's a really staight forward plot and a simple idea with small locations.