New Zealand TV3 showed footage Tuesday of Williams' limited saloon car flipping and rolling four times during a dirt-track race in New Zealand's central North Island on Saturday.
Williams was examined by trackside paramedics, but did not need further medical treatment.
In late January, Williams had surgery on his left hand after gashing it to the bone when the same style of car flipped and hit a safety wall on the last lap of a dirt-track race, also in New Zealand.
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