Neziah Kilusi said he and his father were riding in the bed of the family pickup truck during the pouring rain.
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They say they saw a bright flash and heard what sounded like a cherry bomb.
The lightning struck a nearby transformer and their truck.
"The thing came down and boom, right on my hand," the boy said. "It felt like I got one big huge, one big huge shot from a gun on my hand."
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The boy is recovering after a brief stay in the hospital.
Two workers at the Honolulu Airport were also struck.
Meteorologists say Hawaii rarely sees lightning in June.