supertux/data/images/creatures/bag/bouncing_bag.sprite

(supertux-sprite
  (action
    (name "left")
    (fps 20)
    (hitbox 16 7 32 32)
    (images "bag-bounce-0.png"
            "bag-bounce-1.png"
            "bag-bounce-2.png"
            "bag-bounce-3.png"
            "bag-bounce-4.png"
   )
  )
  (action
    (name "right")
    (fps 20)
    (hitbox 16 7 32 32)
    (mirror-action "left")
  )

  (action
    (name "squished")
    (hitbox 0 0 32 32)
    (images "bag-squished.png")
   )
)