A/N: Kind of a continuation of Invention Gone Wrong.

Splinter sat on the couch watching the news. The turtles were now nine, and they were now discovering their individual interests. It was relatively quiet in the lair for a change. Leonardo was busy perfecting his Ninjitsu skills, Michelangelo was busy annoying him, Raphael was at his new punching bag that he got for his birthday a couple weeks ago, and Donatello was working on another invention. Splinter glanced at Donnie's room; he was a little edgy about his inventions since there had been multiple times were the lair had almost been completely destroyed. And he began to wonder why he still let Donatello perform his experiments. Even though Donnie promised that he'd be careful, things would always go wrong.

BANG! Everyone stopped and looked towards Donnie's room

"Donatello, what is going on in there?" said Splinter.

"Nothing Sensei I'm fine." Said Donnie.

"Donnie this invention better not be a huge disaster," said Raph "cause if our room gets destroyed I'm gonna kill you."

"It won't. I promise this time. I'm so close to having a break through!" said Donnie

Everyone exchanged a worried look, and then went back to doing their own thing, but keeping an eye on Donnie's door.

BANG! "That's it Donnie!" yelled Raph "Stop your stupid invention and get out of…"

BANG! BANG! BANG! "AH!" Donnie ran out of his room, as there was a loud explosion. Then silence.

"Uh…Raph… your stuff's kinda ruined." Said Donnie ready to be attacked any moment now.

"DONNIE! I'M GONNA KILL YOU!" Raph yelled as ran towards Donnie.

"Hey, my stuff is too. It evens out." Said Donnie running into the sewers with Raph running after him.

Splinter, Leo, and Mikey walked over to Raph and Don's room and looked in. Everything was covered in black soot. Splinter sighed, Leo and Mikey started laughing.

"Dude. I wouldn't wanna be Donnie right now." Said Mikey.

"I'm sooooo glad that I don't share a room with Donnie." Said Leo.

"Boys," said Splinter "go find your brothers, Donatello needs to clean this up." Leo and Mikey started walking into the sewers, laughing too hard to run. "And make sure Raphael does not hurt him too much!" Splinter sighed again. This was the last time Donatello was going to do inventions for a long time.