Evil Donnie

Part 1

Once Donatello had completely recovered from his last "incident" with the brain worms, he had immediately got back to work. He's been working in has lab for a few days, trying his best to get a cure for Karai. He knew how much she meant to the rest of the family (especially Leo), and he wanted to make sure he didn't make any mistakes.

Donnie was sitting at his desk, with protective goggles on, as he dropped one last chemical into the mixture. The liquid smoked and foamed, turning into a deep, dark red colour. He smiled with confidence, after finally finishing the cure he had been working so long and hard for.

"Okay, now let's see how this works..." He said while picking up a dropper, and filling it with the mixture he had just finished making. Just before he was able to test it on the worm, Mikey stepped in the room.

"Hey Don, watcha up to?" Mikey cheerfully said while walking besides Donnie. 

"I'm still working on a cure for Karai. And would'ya stop getting so close to my experiments? I don't want a re-run of what happened last time you messed with my stuff..." He said, rolling his eyes, and motioning his little brother to move away. 

"C'mon Don, I promise I won't do anything to mess you up. I'm a totally responsible guy!" He said grinning. 

"Mikey, I don't have time to mess around with you in here. I'm working with serious chemicals, and I can't have you ruin anything. Now GET OUT!" Donnie said, with a much more angered tone. 

"I can handle serious stuff too, Dee! Besides, I'm a lot less clumsy than last time-" He claimed while accidentally bumping his hand into the mixture, and causing it to spill on the desk, and onto Donnie's arm. Donatello sat with his eyes wide, and mouth agape, while the cure he's been working on for weeks splattered all over the table. Mikey also had wide eyes, but he was more worried about Donnie's reaction. After what seemed like forever of them too in shock, Donnie slowly pulled out his chair, and stood up.

"Uhhh..." Mikey quietly said, "Looks like I wasn't as responsible as I thought, heh heh..."

"I'M GONNA RIP YOU SORRY HEAD RIGHT OUT OF YOUR SHELL YOU LITTLE PIECE OFF-" Donnie screamed while chasing after Mikey. Donnie was far too angry to clean himself up from the chemical, or to notice that it was slightly burning off his skin. It was only after his arm started heavily bleeding, did Leo see, and stopped the chase and pointed it out to him. He grabbed on to his younger brother by the shoulder, to stop him from running. 

"Donnie, what the heck is wrong with your arm?!?" Leo asked in a panicked tone, while looking at the burn. Donnie looked down and noticed from nearly his wrist to his elbow was filled with 3rd degree burns. He gasped at the sight of it, more worried that he hadn't even noticed in the first place. Even after seeing his arm, he felt no pain from it. Without a word, Donatello pulled away from Leo and ran back to his lab. He was relieved to see that the mixture hadn't burned any other of his supplies, and immediately went to clean himself up.

After many experiments (And lots of scolding toward Mikey), Donatello had decided the cause of the burn was just the cure gone wrong, and that he was okay. He bandaged himself up, and tried to go the rest of the day without breaking Mikey's skull. The four turtles went to sleep fine that day, knowing Donatello was gonna be okay, and Donnie didn't seem to be affected by the cure he made. 

At least... That's what he thought...