But it was time for the injection to begin and trigger your first transformation.
The first king cheetah injection is injected inside your lower abdomen under guidance.. And your transformation began. After 40 minutes, the packets inside your body were triggered to multiply and absorb inside your host's cells, adjusting to its internal environment and metabolism to support that of a king cheetah, feeding and growing the packets, adjusting your entire physical structure to bear that king cheetahs build! In a bizarre sensation, you felt vibrations, as organs rearranged themselves around your new cellular environment, changing your internal organs, skeletal structures, skin, hair.. Even as you change watching with bewilderment as your bone structures pop, and shift into place, as if the stiff bones were almost being folded like putty and origami and yet feeling so pleasurable with every pop and crack!
The changes start internally, as you transform inside out, like a human into a sphynx cat. Your ears lengthen, no fur, but only pink rounded human ears stretched into circular and triangular king cheetah ears. Your eyes pop and rotate, so the oval center becomes sharp triangles, with two sides longer than the third, and the longer side turning a massive pair of black lenses.. Your nose twists and curves upwards becoming elongated and finally into a king cheetah snout..
Your brain grows larger and brain functions increased 20%, allowing more additional complex thought patterns to occur which allows you to communicate better as both Feline neurons and Human neurons build up inside your brain. You don't know how your voice changed, but you understand more language. Your hearing increases up to 150db. So that you become able to hear whispers. Up until the feline stage, your ear tips seem so round, but gradually turn and begin narrowing until becoming sharp enough that you won't have trouble with modern equipment (even as Feline ears grow out) except in high noise levels.
Your jaw elongates into a more permanent cat shape.. Again you're only ever heard talk of this mythical beast. Never actually seen, but you hope to someday catch a glimpse. However, after years of living your story, you have started taking photos and videos of your new sight. You have 2.5 feet long tail, which is semi thick, a single muscular layer and four extremities at the base, including a long finger tipped claw.. You start chittering in confusion.. You realize this doesn't make sense and decide to do research on it. You've noticed you can control the pace of your paw's movement and limb action, like using your hands instead of paws. Unlike humans, who just kind of tap around and pick up things, cats in general are agile animals, always in motion.. Instead you'd say half way between a spider monkey and felines.. If you were able to actually fully express the differences and unique characteristics, perhaps the world wouldn't perceive them as the same.
Your new spine develops and solidifies slightly different from human ones, somewhat flexible, but very solid, with 48 vertebrae compared to the 24 common to humans.. You realize you can flex just like a cat, and groom any area of your body, you can even bend down and kiss your own tail if you wanted to! You're still bipedal, but you're very quickly becoming a bipedal king cheetah boy.
Just like a cheetah's, your extended claws will provide more balance and gripability on your dashes, rather than help dig and cut for the sake of food gathering, like lions. With your strong and enhanced back muscles and flexibility along with increased energy supply as cheetah muscles, you notice your acceleration is faster. You can jump higher and move with a swift gait, that looks almost sprinter speed.. Able to sprint 65-80 mph depending on wind and conditions. You won't need a car anymore!
As the final phase kicks in, the experimental group members stood behind your locked doors while being given their instructions and kits. You soon are led back to your personal space, which you find awaiting you.
You sit there, in your clothes, giving a happy chirrup as you watch the changes progress.. This time, it seemed much faster than all the other changes you had heard about.. But then as they glanced through the folder.. You got a sinking feeling that athletic ability wasn't the only thing to be tested....
The next thing to happen is to be strapped down to a table as they look you down, head to tail. You shiver.. and then they start stripping off your clothes as you quiver in fear. You were previously wearing a hoodie and boots, some jeans and socks.. Your naked human body is pinned on a table for all to see as they strip your shirt off, exposing your poor nipples and shirt, leaving only your underwear and not much else.. Well at least they left the socks.
Then the white coated men all hold you, careful of limbs and joints, and probe you with devices.. While you try to make sense of this.. While you slowly shake from fear and begin pleading for the strangers and researchers not to hurt you or shame you in front of your peers and sponsor.. They examine your tail first and your bones and muscle fibers of your tail, the process seems painful but quick..
They study your head and neck.. Yes, its as big as a normal cats, but where it is.. It has a modified human brain.. To reduce air pressure when breathing.. Another experiment that makes sense. Your muscles go tense.. They continue on down your torso, lifting it up and looking.. You start hearing ticks louder and louder.. Your skin tingles, noticing your tension radiating out from your chest, down your arms and legs. One curious researcher manages to move his hand near to yours and you begin flinching.. Hesitating a bit.. Yet another shockwave is sent out in this area.. It sends out ripples across your whole body, sending vibrations deep within.. To your heart beating fast.. It pulses wildly, and you tighten your jaw muscles as a form of self defense.
Finally, they reach your crotch.. They rip off your undergarments with a scritch as you howl out as your eyes goes wide open as they get up close to your sex organ... Wait!! Where is it!!!
Touching you so roughly, pushing you harder against the board and feeling you wriggle.. They get two fingers in, and stretch to see the depths..