I could be wrong, but wouldn't you think more padding and thickness with two vest will hit harder than wearing something smaller around your upper body (more mass hitting water at a fast rate)?? Seems like when I wear a large CG approved vest, it hurts more when I fall.
Every now and then I sky a raley and can't pull it back in. My exit or bail-out on this trick is to let go and take the hit with my back (tucked up for protection). It still manages to knock the wind out of me along with a whip-lash for 2-3 days. I'm almost getting to the point of bagging this trick with all the talk lately (knocked out, passing out, killed, etc...). I think I'm leaning with Darren on this, "is it worth it". I would much rather work on style (pokes, tweaking)!