Yamcha was about to attack Trunks and was running towards him. Thinking to himself, he thought to himself, "HEY WAIT, Yamcha is weaker than you already, so you shouldn't attack him" Trunks just stood still. Yamcha ran into Trunks but had some bruises. It was like Yamcha ran into a cement wall. All the girls was in awe, Trunks is so strong , they thought, Yamcha got bruised and Trunks didn't even flinch! He then asked Bulma if he could speak to her privately. All the girls was instantly jelous. He told Bulma, that he came from the future and is her son. BULMA WAS SHOCKED! She didn't believe him at first but then saw the resemblance a little. She asked who was his father and he said Vegeta. She said WHAT???!! VEGETA!!?? Trunks, calmer, said"yep,that's my father, but he died in a battle with a android named cell". He told her that he had a time machine that sent him too back into the past. Bulma agreed to help HER SON. She believed him when he said that he had a time machine, a capsul corp model. She looked at the model and couldn't believe her eyes! The model number was so HIGH!     After a while she looked at the cordinates and said hmm.... this should be the right one. HE said goodbye to her and then heard Bulma just before he took off, yell to Yamcha that she doesn't like him anymore and she's not his girlfriend. He laughed imagining how the timeline would be changed and how Vegeta would respond when Bulma told him, she loved him. He took off again, this time in the right cordinate. He came and went to the wrong location(not the location he came to in the show). He came too late and Freeza and his dad, King Cold, killed all the z warriors except Gohan and Goku. He killed Freeza and his dad and gave Goku the medicine.                                       Go back to his original timeline(now that he knows the cordinates)                                        Stay in this timeline