Luke worked hard on selecting a "not boring" story. Theseus and the Minotaur. He practiced his storytelling, but never showed us his acting...then we saw it...check out the clip around the 2 minute mark (he recently saw parts of Braveheart and you can see the results in his acting). Then again when he did it for the school at 5.44 mark.
The first round of storytelling is for your class. The top storyteller was selected to tell their story at a school assembly for the school and parents. Luke has no problem being in front of a crowd.