Zak gets a thorn in his foot while Zak and Wheezie were practicing during the Dance Contest.
The episode begins when Emmy and Max get their instruments in Dragon Land to play for Zak and Wheezie. They dance to a dragon version of "This Old Man". While practicing, Zak steps on a spiny pine and gets a thorn on his foot, After numerous attempts to go to the doctor, Zak finally got to go to the doctor to get his thorn removed by Dr. Booboogone, and she directed him to squeeze Wheezie's hand as hard as he can, and Dr. Booboogone finally got the thorn out, and finally got back in the contest again, ending the episode.
Notes and Trivia
The song "This Old Man" had the lyrics changed to make it appeal to the characters in Dragon Land.