Tara LaRosa may not have been looking for trouble, but it found her over the weekend – and she has the bite mark to prove it.

LaRosa, an MMA veteran who competed on Season 18 of “The Ultimate Fighter,” spent her Sunday at a flag-waving rally for Veterans Day weekend in Portland. She was there alongside members of Proud Boys, described on on Wikipedia as a “far-right neo-fascist organization.”

When an anti-Donald Trump protester got involved, that’s when things got out of hand.

Here’s video of how it started:

And here’s video of LaRosa subduing the woman who hates Trump:

Based on the video, it looks like the anti-Trump protester attacks a woman, who isn’t LaRosa, after having a flag stick pointed close to her face. That apparently is when LaRosa sprung into action.

“To be honest, what really pisses me off the most about this whole incident is that I tore the shit out of my knees trying to calm her down & keep her safe,” LaRosa said on Twitter.

The anti-Trump woman can be heard on the video claiming to be a professor. She also complains of not being able to breathe and says she’s “half naked.” LaRosa repeatedly tells her to calm down but to no avail.

On Wednesday, LaRosa tweeted photos of an apparent wound she suffered after the anti-Trump woman allegedly bit her chest while being held down.

UPDATE: It’s been 72 hours since I was bitten by the woman who attacked us at the Veteran’s Day flag wave in Portland, OR. Luckily, her mouth did not make contact with my skin. She bit me through a hoodie, a T-shirt, and my sports bra.

“There are conflicting versions of the events, so we are gathering all of the information we can and referring it to the district attorney,” Portland Police Sgt. Kevin Allen told The Oregonian.