According to WSOC, 46-year-old August Williams tried to force a woman into his car outside a karate school.
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Police said the woman ran inside the Bushiken Karate Charlotte Dojo and Williams followed.
Once the pair was inside, Williams got a surprise -- instructor Randall Ephraim, who was teaching a class.
"He was just punching at everything from walls to cars, everything," said Ephraim, sensei at the dojo.
Ephraim was able to get control of Williams and fend him off.
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"He was very strong -- very, very strong," he said. "He weighed at least 200 (pounds) and some change, under the influence -- very strong, powerful individual."
Williams ran out the of the studio and was later taken to the hospital and into custody.
Reports state Williams was on drugs during the attack.