i like the way you have drawings of the step by step you should try a tutorial
I love it! It's a great take on the grizzly horror from RE4 (although i'd probably be more scared if i saw this guy on a dark night).... 5 blue dots for you.
The folds on the bag are ace, along with the seething dark areas by his buttons. All i'd say to improve would be to texture up the chainsaw (not the blade) a bit more. It doesnt seem to have any highlights.