It took a while for Donnie to fully heal, and it took even longer for him to start training again. Leo told you of at least four instances of him falling asleep while working in his lab.

This was the straw that broke the camel's back.

You marched down to the lair to confront your boyfriend. And there he was, working himself away to nothing.

You tapped his shoulder, snapping him back to reality. "Donnie? What are you working on, that's so important to lose sleep over?" you asked, sitting on a spare chair.

"I'm glad you asked!" Donnie shouted, suddenly reaching into a large drawer on his desk. "Let me show you!" he said as he pulled out a giant metallic arm.

"I made myself a prosthetic arm!" he announced proudly as you looked on in awe. "We had some old Kraang tech lying around and figured this would be a great way to use it!" his face was beaming with pride in his finished creation.

"I only tried it once before, so here goes nothing!" he announced as he put the prosthetic arm on. It seemed to fit perfectly, almost as if it had clicked into place.

You continued to stare in awe as the robotic arm began moving, almost as if Donnie was just wearing some giant metallic glove.

"Donnie! You're a genius!" you shouted, wrapping your arms around him in a hug.

You almost cried when you felt him hug back.