My Life as Teen Titan Part 2

"Hyarh!" Robin flew through the air and lashed out at a target board. It shattered beneath his powerful kick, and he landed easily on the training ground.
"Looks like a new record, Robin," Raven called from the observation deck, and Robin punched the air in victory.
"Alright, alright, don't get too excited," Cyborg cracked his knuckles as he stepped onto the training ground, "You ain't seen nothin yet!"
"Yay! Go Cyrborg!"
"I wish you luck, friend!"
Cyborg smiled confidently. "Start the program!" Raven nodded and pushed a button. The timer on the front of the observation deck began to count. A couple of rocks rose out of the ground and guns appeared from beneath. As Cyborg ran through them they shot lasers after him, but the turrets were no match for his Sonic cannon.
"Glorious!"
"Alright!"
Huge iron fists burst from the ground to strike Cyborg. He dodged between them, as easily as walking along a path. A crackle of blue energy shook his arm, but he barely noticed it.
"Way to go, Cyborg!"
"You da' man!"
"Onwards to victory!"
Mighty steel barriars were the next challenge. Cyborg ran beneath them as they came crashing down towards him. But on the last one something went wrong. A blue spark shot through his whole body and leapt onto the barriar. Everything came down in a cloud of dust.
"Cyborg!" His friends cried in alarm, and hurried over as the dust settled. There, lying amisdt a heap of debris, was Cyborg, his left arm lying a few feet away.
"Cyborg, are you alright?"
"Dude, what happened?"
"I...don't know. My systems must be wearing out faster than I thought." Cyborg shook his head as he stood up. Starfire handed him his arm, and he clicked it back into place.
"You will be okay, yes?"
"Yeah, I just...I need some space."
Concern written across their faces, the friends watched helpless as Cyborg walked away.
"Cyborg? Where you going?" Beastboy whimpered, but there was no reply.