That's much better, and definitely a step in the right direction. However, an even stronger exaggeration of the position
could make it look less like he's reclining and more like he's sliding. Also, the way the head overlaps what he should be sliding under is a bit distracting.
You might try rotating him toward the camera some to get the head lower, and drawing the lower arm further back to exaggerate the horizontal movement. (Right now, the lower forearm is facing forward, but it would, in a slide, drag behind the person).
Also, have you thought about altering the design of the character to provide something to help show movement?
I-Ninja has a bandana that flows behind the character for example. I think something like the excess bit of hood in
Ninja Hattori's design could benefit this design. CHR space allowing, it could extend slightly behind head to show horizontal movement (running, sliding, etc.), above the head to show downward movement (falling) or downward to show upward movement (jumping). Excess belt flap could serve the same purpose, although you'd have to be careful to avoid unintentional readings of the sprite since the belt shares color with the flesh. Even if CHR space is tight, sacrificing some of the total size of the head to allow a more unique silhouette could be beneficial.