The concept is great...
The idee not new but kind of fills in the theme.
As for the drawing ( MUST say this isn't photoshop... just pure drawing) preatty neat that black contrast makes the main explosion feel fantastic :D
I quess your focus was on the explosion on the background...
The character design lacks a bit...but that EXPLOSION GAWD :P good DRAWING! I like it :D
Mind to tell that the reflection on the ground looks gorgeous in those colorpencil shades:D