I really like this poster. The shadow of the hand and cigarette appears to be a hand holding a gun. It would look even better with smoke coming out of the cigarette, making it look like the gun was just fired.
Tribeca Flatiron inspiration - Flat Iron urbanscapes Using long, linear brushstrokes and muted, contrasted tones, Italian oil painter Emilio Valerio D’ Ospina creates a tremendous sense of movement, depth and height in his urban images
It's not just a crack on the wall. "Find the cracks and exploit the discoveries to be revealed there . then move on to practice running headlong into the brick walls. Cracks crack first. Heads crack before brick walls. (from: STREET ART UTOPIA)"