Depth of field is hard to accomplish with most of the average digitial cameras unless you know what you are doing. I can't say I can do it without a lot of practice.

An alternative to grass could have been fake blood (ketchup maybe?) drooling off of the wrist from outside the frame. It might have been a bit over the top, but would have added more to the photo by making it much more apparent what was going on in the scene.