Other source:
Trunks and Goten successfully fuse as Super Saiyans, but once again, their ego takes over. Gotenks spends all of his time flying around the earth at full speed, and by the time he decides to attack Buu, his 30 minutes are up. Back at Buu's house, Hercule is doing his best to please the monster. He even cooks him dinner. While away murdering people, Buu finds an injured dog and heals him. Buu discovers the joys of friendship with this dog, and when Hercule tells Buu that killing is bad, Buu vows never to kill again. But while Buu and his pet are playing fetch, two crazed gunmen shoot the dog.
