Huperakron
Silverbolt's slightly ironic fear of heights is well known. During one of the many battles in the Great War, a build up of this fear led to Silverbolt breaking off during a strafing run with his fellow Aerialbots and subsequently being shot down. Disorientated after impact, his assailant moved in for the kill however his shot was deflected at the last instant by an unknown bot wielding a shield. This gave Silverbolt the moment he needed to recover, fire back and kill the Decepticon.
The unknown bot, face and features shrouded by make-shift scrap metal armour and camouflage cloaks, paused to hand him the shield before hurrying off to the next fire fight. "Here, take this shield. Looks like you need it more than me." he said, looking back over his shoulder. Unsure if it was a trick of the light from the setting sun or a side affect of his crash, Silverbolt thought there seemed to be a calming glow around the outline of the mysterious bot, before he disappeared. Placing the shield over his forearm he felt instantly relaxed, and his anxieties leaving him. The scratches, dents and blast marks indicated it had seen many battles. Who knows how many times it had saved it's previous owner?
Standing up to get back into the fight with renewed courage, Silverbolt looked around one last time. Not seeing anyone in any direction he shrugged his shoulders and took off, meeting the rest of the Aerialbots in the sky. From that moment on, Silverbolt found that whenever he wore the shield he was able to forget his fears and move beyond them, not letting them hold him back in his duty to the Autobot cause.