The Robolegs are undeniably superior to any four limbs under Celestia's sun.
Once equipped, a pony could jump onto and off of rooftops without fear of injury, run effortlessly to any destination without tiring, and even break through solid stone should the need arise. However, for all of their advantages, the Robolegs had one unavoidable fault.
They were not real.
This fact became well known to Robotbob very shortly after leaving Twilight's library, as his new appendages managed to attract the notice of everypony that passed by as he walked. Some shrank away in terror at the young cyborg. Others grew excited, rapidly approaching him but stopping half way, as if judging the power level of the cybernetic colt. At one point, Robotbob's right hoof vibrated, signalling an incoming call from Twilight. At the ejection of the cell, the crowd gave a collective shriek of terror and dispersed.
Robotbob sighed. These legs are supposed to make my life easier, he thought.
"My life..."
"I didn't think about that. What am I going to do now?" the colt asked himself, his face scrunched in thought. He let out a breath in resignation. "Pfft, now... Like I did anything before the accident. I was just a gutter rat that prayed he would find an apple core in the next trashcan. And who would hire me now anyway? That crowd scattered like I was going to explode or something!"
His yells echoed in the deserted street.
"I mean, this is better than drowning in a river but why did Twilight Sparkle have to give me these...these...metal freak legs!"
Rearing up in frustration, he stomped hard onto the pavement, causing cracks to spread from the twin impacts. Robotbob seethed, air snorting out of his nostrils and teethed gritted tight. Gazing back at him from the store window… was his reflection. After a minute, he calmed down and let out another sigh.
"What's done is done...Only thing I can do now is roll with it." He stood up tall, legs together royal guard style. He sized up his reflection, taking in its every detail. His eyes became serious and he spoke with authority, "Ok, Private Cybersoldier RobotBob. What is the next mission objective?"
From the window, the reflection held up its right roboleg in a salute. "Sir, to find monetary opportunity, sir!"
"And how are we to accomplish this objective, soldier?" demanded Commanding Officer RobotBob.
"Sir, I don't know yet, sir!"
C.O. RobotBob shook his head in disgust, passing in front of his one colt military unit. " I am DISAPPOINTED in you, maggot! You call yourself a Cybersoldier! If I was you, I would just run off and join the circus where I belong!"
Before Private Robotbob could answer, CO RobotBob snapped back into lucidity. What was that last part? A circus? The thought had come unbidden, springing into his mind before he realized what he was saying. But it was...perfect! The perfect place for a pony like him!
He wasted no time in running to the town hall, scaring the life out of the receptionist filing her hooves. He walked out, a paper in his mouth, with a destination in mind to start his new life
Twilight picked up her ringing iPhone, happily allowing the ecstatic colt to tell her all about his new job as “Bob the Robotic Wonder-Clown” for the rest of the evening.