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A female Black Lives Matter activist was knocked unconscious after she reportedly stole an American flag from a member of the Proud Boys at the massive Trump march in Washington DC on Saturday, Nov. 14.

Cellphone videos show the Black woman holding an American flag while fending off a group of white males with a switch blade.

Another BLM activist on a motorcycle appears to be with the woman. Both women wore motorcycle helmets.

The caption under one of the videos explains that the woman stole the flag from a Trump supporter. When the men demanded the flag back, she yelled, "Don't touch my wife!"

Moments later, a man snatched the flag away from her, causing her to drop the knife.

When she reached down to pick up the knife, another man clobbered her from behind with his motorcycle helmet.

She lost consciousness and collapsed in the street as her "wife" sped off on the motorcycle.

A second video shows a crowd of white males surrounding the woman who regained consciousness and was struggling to get up.

"Don't even f***ing help her!" one man shouted when a police officer assisted the dazed woman to her feet.

The incident was just one of many violent clashes between Trump supporters and far-left groups at the massive Trump March on Washington.

The Secret Service estimates 365,000 people attended Saturday's march in support of their president who refuses to concede to Joe Biden.