Goku's Time is Up

Buu builds a house out of people whom he changed to clay. Goku goes Super Saiyan 3 one last time to show Goten and Trunks that they too can reach this stage. He uses up the rest of his time on earth and the boys are left under a rigorous amount of training to perfect the fusion dance but with Piccolo as their instructor you can be sure they won't rest until they get it right.