A scientist created the pill that would endow the one that took it with superpowers. However every person they gave the pill to became very sick. So the govermen used their super computers to find the one man who could tolerate and benefit from the pill.
It was Stanley Bemish a 98 lb wealking that was singled out. He would pop the pill and undergo the change to the series backround music. He would doff his coveralls and don goggles and a gold jacket with panels sewn under the arms and attached to the sides of his jacket.
By flapping his arms he was able to fly. His take off always created a blast of air and the sound of a rocket.