Now, Trunks at this time and point, is in the past, kicking some changling (freeza's race) ass! They may be as cold as ice, but Trunks has got the heat to back it up (that was a joke....cold=freeza heat=burning attack, get it? Oh never mind!) After that, him and the others have to wait for Goku. Trunks is so smart! He knows where Goku will be before he lands! Okay, so it was a watch created my Dr. Briefs, but Trunks was using it! Soda time! YAY! Then, they all wonder who he is? Course, we all know he can't tell. So then Goku arrives and Trunks tells him everything; his parents and when he's from. So, Trunks, our hero gives Goku the medicine so in the future he'll be safe from the heart thingy that would have killed him and- Am I typing too much? It's just this part is important!