However, the truck was carrying radioactive waste, and some spilled out directly onto Matt's eyes causing him to go blind.
With his vision gone, Matt's remaining senses of hearing, touch, taste, and smell became heightened, and he was able to "see" using a form of "radar sense", that showed outlines and shapes.
While walking down a street one day, Matt noticed a blind man was about to get hit by a truck.
He ran in front of the truck, and pushed the blind man out of the way.
He began as an amazing gymnast who honed his boxing prowess at Fogwell's Gym.As boxing work became scarce, Jack went to work for a local mobster, the Fixer, moonlighting as an enforcer in addition to taking fights.While his father was away, Matt secretly started training himself on his father's equipment.His radar sense was shown and used before, but never explored.An arc where Daredevil loses his radar sense reveals that it was Stick who actually trained him to use it in the first place.