I agree with sounguru. the only thing I regret is not having my camera. it is a crappy camera, as far as underwater images go... but I would have given it a shot. I think what would have helped prove the shrimp was not dead, was that this was happening on the glass, near the top of the tank. so unless someone knows that dead shrimp can fix themselves to the glass, then that would have established it was alive.
nonetheless, it was alive, as in my account, the shrimp walked right into the situation. it was not dead, nor dying.
either way, sounguru is correct, imo. I think this is rare, and I am still rather shocked I actually saw this... I honestly never expected to, and I do not expect to again, to be truthful. it is just so ironic that this would happen to me, when my snail to shrimp ratio is WAY smaller than a lot of people here, including sounguru's. frankly, I would have expected someone with a setup like his to see that happen, if it could happen... not me.
but hey... just goes to show... nature happens on its schedule and plan... not ours. LOL...