You heard of him, he is Academic City strongest, maybe the world's strongest, yet he is weak. After all whit out his powers at hand, he is physical weak , mentally weak , so his defeat by the hands of Kamiyou Touma was inevitable.
On that faith full day Accelerator was knocked unconscious, he woke up and went from being the Strongest to the weakest, but that's only what we Weeaabos perceived.
In the mucky and dark land of unconsciousness , Accelerator lived an experience like no other, an experience that changed him for good.
A life among ponies.