[there was a question about constraints]
What I would think about is what is going to be the driver. The character or the piece the character is interacting with it. I remember hearing this analysis through A Bug's Life (DVD or something, don't remember), where a tiny bug would hold a match. Since the match is heavier the bug's arms were constrained to the match and the match was driving the arms. But if a heavy set guy is holding a feather, then the feather is constrained to the hand and the guy is driving the feather. Hope that makes sense. :)
Your clip looks good already, it's all very clear. I would maybe bring up the camera a tiny bit since we loose the ring once it's on the table. What would you think about having the guy do something with the ring at the end. Maybe he comes back and takes the ring with him since he can't let go of it right now? Just throwing out ideas.
I like the walk out, it's going to be funny to have the guy's root not go up and down that much. You know when you carry something really heavy you hurry and take lots of tiny steps? :)
One thing to think about, not that it bothered me, but when he takes off the ring (please include a frame counter - using the quicktime fc it's on x98) the silhouette could be a bit clearer. The ring is right in front of the screen right upper arm and the hand/fingers and right in front of the forearm. Maybe have it happening more screen left or screen right, but either way with the hands to the side of the body and not in front of arms. Since you have room and him taking off the ring is a story point in the clip, might as well make that super clear.
Hope that helps, keep going!