As two other men raced to distract the animal, Leal leapt back up to his feet, grabbed his butt and hobbled away, with his pants ripped and stained with blood.
However, the man continued the fight. Video shows him eventually holding up the bull's ear to cheers from the crowd.
He was later carried out on a stretcher, visibly in pain.
According to the surgeon who treated Leal, a bone in his sacrum kept the horn from going up any further and killing him.
"I cannot explain how he could continue to fight and kill the bull, because a normal person, with such a wound, cannot walk," doctor MĂĄximo GarcĂa Leirado told Mundotoro.
Leal is expected to make a full recovery.