casey levi filmed the moment he tried to get his son sam to eat a california roll with a $ 10 prize up for grabs .
footage shows the youngster stepping up to the challenge but backing down after a minute 's hesitation and running off ` to be sick '
after sam 's ruled out of the game , his younger sister charlie confidently steps up to the mark .
with $ 10 in her pocket she gives her father a celebratory a high five .