Strobe
Felix Garner discovered his super speed the same time his epilepsy manifested. It was a horrifying experience, one he will never forget. He was eight and playing on the monkey bars when he froze, then spasmed, then froze again--going back and forth bouncing throughout the monkey bars, blood spraying everything. It all ended with Felix lying on the ground, shallowly breathing, coated in his own blood.
For those children looking on it was frightening. Felix's best friend, Tommy, later described it by saying Felix looked like a humming bird trapped in a cage, who was slamming itself into the bars in a desperate attempt to free itself.
Fortunately for Felix, as he grew older, the tonic-clonic seizures happened at such great speeds that he just looked like a person moving through a strobe lighted disco.
Felix's first attempt at being a hero accured at a grocery store where a crazed lunatic began to shoot up the place. The would be killer was unable to get a bead on Felix as he closed in and delivered a supersonic punch that sent the shooter flying out into the street where he laid unconscious. Soon after Felix created a silver and white costume becoming the hero known as Strobe.