the death is good -, but perhaps could be more effective if he stayed on his knees a little longer, and wobbled slightly backward before he falls forward. at the very least i think it would benefit if the arms/shoulders were shifted back...
actuall now that im zooming in, if you wanted to keep it as is, id say that at the part where he supports himself with his arms, it would be good to indicate a little elbow bending before the arm straightens out again, until he finally collapses forward. that way you get that sense of weight in the arms. the elbows would be catching the weight in this action, not the shoulders.