When is Chris Brown going to learn, the former Rihanna beau, who is still on probation for beating her up in the car on Grammy night in 2009, is being accused of violently pushing a woman down to the ground.

Deanna Grimes reached out to TMZ to explain what happened on Saturday night and offer up why she might even need surgery after Chris' supposed assault.

Grimes claims she was with Brown at the VIP section of the Heat Ultra Lounge in Anaheim on Saturday night, where Brown just performed with Nicki Minaj and gotten some panties too.

When the bar was about to close after last call, she claims Brown deliberately shoved her to the ground on her knees.

Deanna claimed to have called the cops to report the assault, and TMZ can confirm an assault claim was made that night at the Heat Ultra Lounge, but the police wouldn't give any names.

The Anaheim police are currently investigating the assault allegations from Grimes.

After heading to the hospital to have her knee looked at, Grimes said the doctors told her she had torn knee ligaments and might need surgery. She's going to see another doctor before going under the knife.

Brown's rep, Nicole Perna, gave TMZ a statement:

"I'm unaware of the incident, as is Chris' lawyer and his entire team. He was in a great mood after Powerhouse." Perna adds, "None of this makes sense."

Brown did tweet out that "I didn't do anything," before deleting it, and personally reached out to TMZ to stop the lies.

Chris also added, "I don't usually comment but I didn't do anything. Had a great show at powerhouse and a positive one."

He then deleted the messages and replaced them with, "positive energy... The devil is always working. If it wasn't for my faith and my fans, I would've quit music along (sic) time ago. I'm tired of it man....! stay positive".

We're not sure Chris Brown's rage at Rihanna in 2009 made much sense either, or at Drake and Frank Ocean, but violence of that order never does.