Lol!!! love this. Reminds me of when I used to play assassin games in school. We'd put post it notes with skull and cross bones on the bottom of a glass to simulate poisoning. The look on a victims face when they take that last swig o' snapple and see that grinning face. . .
Awesome image! The detail, the action, and his expression tell an entire story, which is always hard to do. The background is detailed enough to give a sense of setting without overwhelming the figure.