Gotenks did it

"Fuuuuuuu-sion! HA!" Goten and Trunks were training at Kami's lookout with Piccolo, just in case another threat like Buu came around.

"Alright, look who's back in business, baby!" said Gotenks arrogantly

"Okay, now that you're fused, we can seriously train. Are you ready?" Piccolo asked

"Nah, I'm bored. Plus I'm tired." said Gotenks, floating around casually

"Gotenks! Focus, for once! PLEASE." said Piccolo, clearly frustrated with Gotenks' antics

"Screw you, Piccolo! I'm bored, and I can do what I want!" said Gotenks arrogantly, Piccolo facepalmed

"What did you say?!" questioned Piccolo

"Oh, I'm sorry, here, I'll say it louder. SCREWWWWWWWWW YOUUUUUUUUUUUUUUU, PICCOLO!" Gotenks yelled it for the world to hear. In fact, Gotenks' yelling was so loud, it ripped a hole in the universal fabric. Three guesses to where it goes.

"Y'know what, I'm gonna go now, see ya, sucker!" said Gotenks, who stepped through the portal

"No, wait!" Piccolo yelled before the portal closed

In the portal, it wasn't just instant teleportation, there was a space in between than transcends space and time, it takes those who travel in it to the other side of the portal, like a bridge.

It took only a few minutes before Gotenks defused back to Goten and Trunks.

"Oh no man! What did we do?!" said Goten, panicking

"We didn't do anything, remember? It was Gotenks." said Trunks

"Nuh-uh, we did it, Gotenks is-" it took a moment for him to realize where Trunks was going.

"Oh yeah, Gotenks did it. I remember now!" said Goten, who had a smile creeping across his face

"Alright, now shut up, and wait for the portal to take us where we're going." said Trunks

They waited, and waited for about five minutes until they finally saw something.

"It's so bright! Shenron, is that you?" said Goten

"No Goten, it isn't" said Trunks smugly