I recognize my pose may not be correct, but your's looks awful, even for a quick edit (no offense, I'm sure you could do better if wasted more time on it, which you don't have to). I may take photos to ilustrate it...tomorrow.
About the arm...I know it's doing nothing, but I don't really have anything to give him...
I may change it's pose afterward though...At this moment I'm more worried about the hand, could anyone please give some C&C on it?
EDIT:
I know that new hand sucks, but I only spent a minute on it...
EDIT2: Just looked at Stitchy's post again and I noticed what was wrong with both my sprite and your edit...In mine, the legs a bent alot, in yours, the (his) left leg is not bent at all. At first, I tried posing his legs somewhat like
this, but it didn't work out...