Other source:
Gotenks creates ten ghosts that detonate with explosive force when they are touched. He sends all but one at Super Buu, and they reduce him to a deformed puddle of his former self. Gotenks sends the final one down Buu's mouth, blowing him into tiny pieces. Gotenks and Piccolo destroy all of the pieces, but the smoke coming from the pieces gathers above their heads and reforms Super Buu. To play up the drama of the situation, Gotenks acts like he's out of ideas, and Buu begins beating up on the fused Saiyan. Suddenly, Piccolo destroys the door to the outside world, which traps the three of them in the Chamber for all eternity.
