You can call it a technique, but I liked "Regeneration." That ability that all Nameks have to grow back a limb, when you lose it. Darn, I wish Piccolo wouldn't have let Cell absorb some of his DNA, then when Android 16 riped off his tail, he wouldn't be able to grow another one and let Cell absorb 17 or 18. Or another time when Vegeta used an incredibly strong attack and blasted off the right side of Cell's body. And the last time, in he Cell Games, when Goku used Instant Transmisson, while preping a Kamehahmeha attack, and blasted Cell's torso off. I mean, really!!