The big bug is named Tim.

Tim has a big problem.
He has something stuck on his back legs. He cannot walk properly! That is why he is so sad.

Where is Doc Littleton?
He is trying to help Tim. Doc Littleton has tied one end of the rope to the metal thing.

Then Doc Littleton and the ladybugs start pulling...
They tug
   and pull
      and huff
         and puff
            until...
               POP! It comes off. They did it!