Hyperelasticity
From Activating Evolution
Hyperelasticity, also known as Hyperbounce or Hyperinflation (when these parts of the ability are used) is exaggerated pliability of the body. A person with this ability can extend their limbs, contort their bodies, blow their body up like a balloon, bounce like rubber and resist extreme concussive force (even beyond that of a nuclear explosion). Not to mention, they can ground electricity. A person with this ability usually has a stretching limit, and thus, once they pass it, they are susceptible to pain like any normal human.
Piper is known to have this ability.
