After getting abducted by aliens and being transformed into various shapes, the last one was a stegosaurus. He swelled up too big for the ship, bursting out of it. The aliens sent him back home, however, they seemed to have failed to change him back this time around. And...and is he still getting...bigger?

You can find the short this is based of here, courtesy of Gelty https://www.youtube.com/watch?v=6lhKGYqVgi8