So I was messing around and came up with a way to chop his arm off with more than half you body all relaxed (yes, im aware you can probably come up with better but for me, that's pretty good since I'm just experimenting with limpness)

don't hold all (duh)
right bend lumbar
right rotate chest
contract left pec
extend right pec
raise right shoulder
extend rigth elbow and wrist
hold left shoulder
space x2

There you have it! Thoughts?

heres a little something I did with your "gentle" move