Eugene Patillo is the son of Vincent Patillo. Vincent was an unsuccessful inventor who once modified one of his inventions (an electrically-powered spring systems with gyroscopes) to become the supervillain Leap-Frog.

The elder Patillo was also unsuccessful as Leap-Frog. After coming out of prison, Vincent retired his villainous identity to take care of his family.

However, Patillo was barely able to support his home, especially after his wife died of cancer. He sunk into despair, believing the Leap-Frog episode had ruined his life. His son Eugene, wanting to do help his father, resolved to use the Leap-Frog technology in order to become a crimefighter and redeem his father’s name.

He thus began an enthusiastic and fumbling fight against crime. He even once fought alongside Spider-Man and the Human Torch, accidentally defeating Speed Demon by landing on him.

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