You want to first wrap the crushed ice in the moldy lettuce, next put the crushed-ice-in-moldy-lettuce-combination on the spoon, then pull back on the spoon, then finally let go of the spoon, thus firing the crushed-ice-in-moldy-lettuce-combination at your attacker, hoping to disable him.
Is that about right?
Maybe I should just try to hork something up at my attacker instead.