These turtles are here to show us the true meaning of friendship.
When one turtle noticed his buddy stuck on his back, he knew it was on him to lend a helping hand.
So he approached the belly-up turtle and used his own legs to get his buddy back on his feet.
It took some serious effort, but in the end, he was successful (to the clear joy of several eagerly watching children, who you'll hear cheering in the background).
The takeaway: Always offer aid to a fellow turtle (or human) in need. You'll be all the better for it.