You rush in to the locker room. The exit door is on the other side. From somewhere in the locker room you hear a moan that is slowly turning in to a squeak sound, like your balloon flesh makes.
You peer behind one of the rows and see a guy sitting on the floor with his legs spread out. His ears are balloon, inflated, so are his feet and hands, arms and legs. His torso is swelling as you watch. He moans again and you can see that he is jacking off as his erection changes and begins to shrink. The sounds from his mouth are not human, they are high pitched and squeaky as he swells, his donkey tail is sticking out behind him at an angle as he leans against the lockers. His face changes next, pulling forward, making squeaks and pops as its plastic surface pulls forward. He brays a little, but it sounds muffled as his mouth closes and seals shut turning in to plastic.
You rip your gaze away and hurry back to Nate who is almost across the locker room. His balloon is gone.
"Nate! Your balloon! Its g-AWHEEEHAW-n" you shout, hearing your own donkey braying. Nate turns around wide eyed and looks at his wrist. "Oh shit. Its gone. You said yours was gone too. Im gonna change. I dont wanna change too! We gotta get outta here." Nates voice is shaking with panic.
You reach for the door but your balloon hooves cant get a grip on the knob and they squeak and squeal as they slide around. Its hard to break old habits. You stop trying to the door and let Nate.
"Its not opening. Its locked. We cant get out. Ugh..." Nate doesnt finish his sentance as he doubles over.