So you're running a game one night and you search through your boxes of minis and you just can find what you need to represent the nexy horror the PCs com across. That is because you don't have the Flail Snail
But the best thing about aberrations is altering them on the group. So you've fought a dozen relatively stationary flail snails in a couple different rooms when you get to a room with just 2 of them with different coloring, maybe slightly bigger than their fellows. The spring attacker jumps up hits one and springs back. On their init, frog-like legs drop out of the shell and the snails start doing great leaps, matching the spring attacker at his game. But they have a pounce ability so they attack with all their flails when they land. Fun stuff.