You can see the customer arguing with the valet before he swings and knocks him out with one blow to the head.
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The valet, Rodolfo Rodriguez, was unconscious for several seconds.
The customer, who claimed to be a former police officer, even appears to frisk Rodriguez when he's on the ground.
Rodriguez said the guest didn't want to pay the $18 parking fee.
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Staff at Ocean Sky Hotel and Resort are questioning why the guest wasn't arrested.
Police said they didn't see the video until Friday and are investigating.
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