Next time a brawl breaks out, Dez Bryant will bring his helmet with him.

He learned a lesson the hard way, getting cold-cocked on Tuesday as the Cowboys-Rams joint practice dissolved into a free-for-all, and Bryant was caught with a punch to the nose that stunned him.

Wanna see Dez Bryant get punched square in the face? Of course you do http://t.co/nlYHGadQbz

— Jon Johnson (@jonjohnsonwip) August 19, 2015

Bryant, seemingly getting ripped on Twitter, responded.

“I wish I would have cheap shot his a– then all of y’all would have seen the difference,” Bryant wrote. “You can’t even put that s–t on world star lol.”

The tweet was soon deleted. It’s unclear who hit Bryant. The Rams player was wearing No. 45, but the Rams website lists two players with No. 45, cornerback Imoan Claiborne and fullback Zach Laskey.

Most importantly, however, Bryant’s diamond earring that came off during the scrap, was retrieved by a security guard.

Security guard found @DezBryant's diamond earring, which he lost during the fight (via @VictorNBC5)… Wow. @NBCDFWpic.twitter.com/Kb5VfEAZNL

— Pat Doney (@PatDoneyNBC5) August 19, 2015

It was Bryant’s second preseason tussle after squaring off with teammate Tyler Patmon in early August.