The goo spreads up the back of your legs, slowing your struggles to flee. You tug at the slime, trying to wrench it off, but it instead spreads up your arms. You try to shout for help, despite nothing but other beasts being in this place, but it changes to a shaken shout.
Slime bulges from your backside, a second pair of legs splitting from your own. Thick fur starts to cover it as you look back in terror that's slowly being wrenched away. Your shorts are ripped from the change, your feet changing to hooves and your hands to some sort of paws.
Your nose lengthens into a muzzle as you try to leap away, the rest of your new body following, unable to be separated now. You snort and snarl, human voice dripping away as your horns finish growing, leaving you stumbling and confused as to how you move in this new body.