AMPU-MAN! While working late at his job in British Columbia, logger Adrien Abney was bitten by a radioactive beaver. Normally, this would have granted him all the powers of a beaver, but the intense pain of the radiation changing his body chemistry caused him to spasm wildly... which, considering he was wielding a running chainsaw at the time, did not work out in his best interest. He woke up six days later in the hospital as a quadripeligic, his arms and legs having been severed by the chainsaw and replaced with experimental devices - rockets in his leg stumps which enabled him to fly and matter generator devices in his arm stumps which enable him to create solid objects including weapons of all sorts at will.
And he can also chew through trees with his teeth, but that's beside the point.