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Yeah, but the guy wasn't supremely powerful and whatever. He only became powerful permanently at the end of the film.
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Even if you used 100% of your brain consciously, you wouldn't be able to do that shit. Telekinesis, telepathy, teleportation, infinite energy, infinite speed, ability to time travel at will, invisibility, invincibility, invulnerability, immortality, ability to stop time, and ability to see everything down to the quantum level, and the reaction times faster than the speed of light? Nope, not gonna happen, not even if you use 100% of your brain consciously.