My first flourish was jackson 5, i just picked up a deck, saw a video of it once, and just did it straight off with no practice, should have made a thread about it to gloat to everyone, and then hide it by pretending to care what their first flourish was...
Trying to remeber I think the first flourish that I saw was the werm but the first one that I learnt was the swivel cut and then The Cuso's 7axaphone display