Authorities say Scott Bradford was leaving a convenience store near the intersection of 175th and A Street when he pulled out in front of another motorist.
The second motorist repeatedly punched Bradford, who's currently in intensive care at a Tacoma hospital.
The assailant is described as a black male in his 20's, about five-feet-eight with a slender build and short black hair.
He was wearing a green and brown fleece coat and driving a forest green or gray sedan, possibly a Ford or Chevrolet.
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