You press the "Random" button. The screen blanks and then displays a "TRANSFORMATION IN PROGRESS. PLEASE WAIT..." message. You snicker and attempt to walk out, forgetting that you're still naked. However, the door, though it appeared to lock from the inside, is unopenable. Checking the other door, you find that it, too, is locked. You begin to get a little worried, but you're sure that someone will be along to unlock the door once they've had their fun with you. But as you're pondering this, you start to feel a little strange. Your muscle tone seems to increase, although there's still no noticeable muscle definition. Wondering what the hell is going on, you turn to the mirror, just in time to watch your fingernails and toenails change into retractable claws. Clenching your teeth in sudden fear, you see them all become canines, with your original canines becoming a nice set of fangs. You blink in surprise, only to find, when you open your eyes again, that they have become green feline eyes. Your skin starts itching, and you stare at the mirror as night-black fur sprouts all over your body, with even your wiry armpit and pubic hair becoming soft black fur, and your normal brown head-hair vanishing into your scalp. Underneath the fur, you can see and feel your head reshaping into something closer to a cat's muzzle, complete with a bare-skinned black nose at the tip. You notice your ears becoming thin and pointed, and moving towards the top of your head, where they stop, now a fine pair of cat's ears. Your feet, as you watch, rearrange themselves into feline paws, and you feel pads developing on the bottoms, as well as on your palms and fingers. Your knees suddenly alter to become double-jointed, now resting by default in a slight dogleg position, your shins becoming slightly shorter to enable easy quadripetal motion. You feel a pressure in your tailbone, and watch as a slender tails extends out of your spine. Looking in the mirror, you see that you're now fully a an anthropomorphic panther.
Or are you? You remember that in mammals other than humans, the male has his penis encased in a sheath, but yours is still hanging free. You wonder whether this is supposed to happen, but before you can think too much about it, a second wave of changes sets in. You shrink a little bit, and become a bit more slender. Your hips widen a bit and your waist narrows a bit, your shoulders softening from a broader square-shoulder look into more of a gentle curve. Your entire figure, in fact, becomes more curvy, your legs and arms becoming shapely and slender, your cat's face softening a bit. Overall, you're still obviously strong and sturdy, but a lot more...feminine? Realizing with a gasp what's happening, you screech, only to find that your voice has gone from a nasal tenor to a soft alto. You can only stare at the mirror in shock as flesh gathers under your fur-covered nipples, expanding into two shapely and clearly female breasts - strangely, despite the fact that you're not wearing a bra, they seem to be perfectly supported by a layer of muscle underneath the skin, something you can only guess is to enable female guests to run when necessary without their breasts bouncing around all over the place. With a terrible sinking feeling, you clutch your last vestige of manhood, your penis, as your scalp-fur grows out into silky black hair, falling down almost to your shoulders. But as soon as you clutch it, your penis begins to shrink. On the verge of tears, you watch as it shrinks down and suddenly inverts itself, becoming your new vagina. Your hands rest on the outside of your new female genitalia as you feel the back of your vagina expand into your new womb, your testicles taking their new place inside you and becoming your new ovaries. It's over - you're not only an anthropomorphic panther, you're a female anthropomorphic panther.
Turning away from the mirror, you see that the message on the screen has changed. "TRANSFORMATION COMPLETE," it reads. "PLEASE EXIT OTHER DOOR." Trying the other door, you find that it's unlocked. In a daze, you walk out, forgetting even your clothes. You find yourself in a clearing in the woods with a pond in the middle. Turning behind you, you find that the door has shut, and, to your horror, you find that it's locked. Rushing to one of the many similar doors along the building's back wall, you find that it too is locked. Looking down the length of the wall, you see that the corner of the building is the beginning of a very large and obviously very high-voltage electric fence. You're here for the duration, apparently - your much-anticipated vacation is going to consist of a month spent in the woods as a female anthropomorphic panther. Left devoid of everything that you were, alone in the woods, you can't contain yourself anymore. You break down and begin to cry.