Description:
Sunburst claims not to be ticklish due to building up endurance when Starlight tickled him when they were younger. After his claim and Starlight seeing through his lies, she takes some quills she borrowed from Twilight and, as expected, she proves him wrong. He tries desperately to hold in his laughter but we all know as soon as she gets to his belly, there will be no holding it in.
Starlight: Tickle, tickle, tickle!
Sunburst: tries not to laugh
