On a sun-drenched meadow in Australia, a group of quokkas, known as the "world's happiest animals," is holding a unique race. Their "sacks" are giant, hollowed-out gourds or melon rinds, which they've clumsily squeezed themselves into, with only their smiling faces peeking out. The finish line is a picnic blanket laid out on the grass, piled high with their favorite prize: juicy leaves and fruits. A few kookaburras nearby serve as referees and cheerleaders, letting out their famous laughing calls.