[quote=Leonerdo]
Kinetic energy has molecules! Wow! No. Kinetic energy is nothing like other forms of energy (atoms can have kinetic energy - but we call that temperature, and operates different than what we - sorry, I mean , understand typical kinetic energy). In fact, this stills stems from your lack of understand of kinetic energy. In fact, it's a pretty metaphysical term that we use kinetic energy to explain motion and inertia. That said, take out the word "kinetic energy" and replaced it with "motion" and you have what is essentially the same idea. So, sorry to burst the bubble, but kinetic energy isn't a biological phenomenon.And nope, wrong again. Lightning is NOT pure kinetic energy, it is an electrical discharge. It is electrical energy. Saying lightning is pure kinetic energy is like saying lightning is pure motion. Which is, of course, dumb! But congratulations, you know that lightning is made of plasma and the general idea of what plasma is. Just by saying that, you contradicted the prior statement by suggesting lightning is pure kinetic energy. Kinetic energy is produced as the ionized gases that makes up the lightning heats up and strikes, and also results in .No, I definitely read. The reason it doesn't make sense is because I said the same thing back to you. So, you absorb the kinetic energy in a punch, but it still maintains its momentum and creates an impact, hitting you in the face? How would you even convert kinetic energy into plasma? What exactly is the result of that?Holy shit. Take a step back and examine how insignificant that petty detail is. Okay, whatever, the flame. The point stands. The flame is plasma. Stars have plasma and super heated gas. Entirely irrelevant to the conversation at hand. It looks like an attempt to make yourself feel better, or something, I don't even know at this rate (but, hey, speaking of petty irrelevant details - and this probably doesn't mean anything to you or anything [I just figured to mention it since you seem to enjoy doing it] - I was here long before you, or even most people given how I was in this roleplay's previous incarnation). But on a more serious note, I want to cover some details I haven't yet done here yet. I was talking to someone and this is what came out of it:They: "But in theory, you could get kinetic energy from your bloodstream moving."They: "Not a lot."Me: "If you want to absorb that, go ahead. I'll sit here, off to the side, while your brain and the rest of the body is being deprived of blood and oxygen."Me: "And then there's your heart, still pumping, and your bloodstream not moving. You'll probably even get a heart attack."They: "That is if you absorb all of it. But what about a small portion?"Me: "You'll probably suffer the same effects as super low blood pressure. Granted, the blood pressure might be the same, or even build, but a slow moving bloodstream will at least make you light headed and tired. And then you might feel tense, because if your blood pressure builds, that's applying pressure on the inside of your veins and arteries. And if your heart rate remains the same, it's working just as hard for a smaller benefit. And the blood is moving slow. So the heart might even work harder."EDIT: Woop, woop. Sorry about that Allen, didn't see ya there.
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The molecules in our body are constantly moving. Pretty much every type of energy is either potential (not in motion) and kinetic (in motion). Temperature (which, is an energy transfer from the molecules to the environment surrounding them--kinetic energy) is exactly what is going on and why is IS biological. 

Here I'll break it down for you how I am seeing it: 

She gets punched in the face.
Her body registers the speed, pressure and amount of force based on the kinetic energy that is being transferred from fist to skin to nerve endings. 
The nerves then takes that data and encodes it to her brain, piggybacking off of the coding for pain.
Brain then sends that, along with the sensation of pain, throughout her body.
The body responds to the injury as normal (inflammation, repairing of ruptured blood vessels), but also releases something else. 
While the normal bodily functions are occurring, the kinetic energy from the punch itself doesn't stop. It is absorbed and carried by biologically occurring molecules that are created by her Meta-Human gene. 
These molecules are always in motion, always vibrating and are found through her muscle tissue. While the nerve receptors are transmitting the pain sensation to the brain, this network of compacted, vibrating molecules send their own signal to the brain, which carries the information of the kinetic energy that was transferred to them.
The brain decodes them both simultaneously. When it sends out the "pain signal" it sends out a very similar signal to the molecules within her muscles. This signal overdrives these molecules into vibrating much more than normal until the feedback matches the initial signal. This results in creating the same amount of potential energy that was present upon impact. 
Once that energy is put into motion, via her punching back or throwing a something into his face, that potential energy buildup rushes to the point of motion and is released with the same amount of energy as the punch. The force can change depending on mass and surface area as to what the energy is being transferred to, but the amount of energy is the same.