It seems like former UFC star Brock Lesnar and WWE Chairman Vince McMahon have a rather strange relationship.

By all accounts, Vince and Brock are quite good friends, and the latter has always been treated well in WWE by the CEO and Chairman.

However, the two big personalities have had their fair share of squabbles over the years, one of which was even caught on camera.

Back in 2018, Brock walked into WrestleMania 34 as the Universal Championship, defending his title against Roman Reigns in the show's main event.

Many fans expected Reigns to win, given he was who WWE wanted to push as its next top star, but that isn't how things panned out.

Instead, Brock won the match, and many fans and wrestling commentators have speculated that Vince decided to give Lesnar the win because no one expected him to win.

You'd expect Lesnar to be quite happy with the win, given that he was still WWE's top champion and had won the biggest match of the year, but that wasn't the case.

Lesnar walked to the back after the match and was noticeably angry, throwing his Universal title at McMahon, as you can see below.

Fans really didn't receive the match too well, and audibly started booing, so this is likely what made Brock so angry.

The footage was part of the WrestleMania 34 documentary released onto the WWE Network, so it wasn't like Vince tried to hide the altercation.

Things appeared to be pretty smooth for Brock and Vince after that, so it's not like the WWE Chairman was angry with Lesnar for how he acted after the match.

Speaking of Lesnar, the 44-year-old returned to WWE last night on SmackDown to set up yet another clash with Reigns, this time a Last Man Standing match at SummerSlam.