My Little Pony: Friendship Is Magic

Season 1, Episode 16

Episode Title: Sonic Rainboom

Air Date: 2011-02-18

Overview:

Rainbow Dash is preparing herself for an upcoming contest, with a day with the famous Wonderbolts as the grand prize, and is sure that an old move she claimed to have pulled off long ago will guarantee her a win. However, she becomes increasingly nervous that she won't succeed.