Seth Rollins broke one of Vince McMahon's 'secret' WWE rules during tag team match on RAW last Monday.
He was inadvertently disqualified after attacking Rey Mysterio while he wasn't the legal man, prematurely ending the match in an awkward fashion.
But Rollins isn't the only one who has fallen foul of a secret rule.
Plenty have done before him and many more will follow.
On the back of 'The Monday Night Messiah's' mistake, The Sun have run down 10 of WWE's 'craziest unwritten rules'.
Check them out:
It was once a running joke in WWE that Vince McMahon hates sneezing and doesn't like his employees doing it backstage.
But that joke was confirmed by Paul Heyman a decade ago, revealing the boss doesn't like sneezing because he can't control them.
"Here's the best story I can tell you about Vince McMahon. It's the ultimate Vince control story," he told MMA Hour in 2010.
"If you're in the room with Vince McMahon and he sneezes, go on your Blackberry for the next 20 minutes because nothing you say to him is going to get through.
"Because he gets really p****d off cause he can't control the sneeze."
Another of WWE's unwritten rules is for a Superstar to lose during a show in their hometown, despite usually getting a very good reaction from the crowd.
Luke Harper, who now wrestles in AEW, once spoke about the curse and how he feels about it.
"I know about [it], and I feel that," he told the Democrat and Chronicle newspaper.
"I actually had a really great match with Dolph Ziggler that I thought I should have won and I didn’t. That really sticks in my craw. It’s something I think about.. but it’s nothing that’s in my control."
Referees over-selling injuries
While Superstars usually take a lot of punishment during matches, the referees don't.
They can go down dazed at the slightest bit of contact, allowing heels to pull off some illegal moves without being disqualified.
Don't say 'title shot'
A lot of things annoy Vince, even basic language.
Mick Foley once told a story about how Braun Strowman, a six-foot-eight, three hundred pound monster, was chewed out backstage for saying 'title shot'.
"I heard Braun Strowman say, 'I want a title shot'. Mr McMahon's behind the curtain, at the board watching the monitor, and he goes, 'Oh god, it's not a title shot'.
"I was thinking to myself, then what is it? That's exactly what I would go to call it when I would go out there. You want a title shot.
"He's like, 'it's a title match. It's a match!' So if you ever wonder what it's like to see a six-foot-eight, three hundred pound behemoth get chewed out, you should've been there."
Don't call the championship a belt, either
Similar to 'title shot,' Superstars aren't allowed to call their championships a 'belt' - according to Chris Jericho.
He recalled a conversation on his podcast that went: "Hey Vince, I don't know if I should lose the belt.' [Imitating McMahon] 'The what?' 'Sorry, the title'.
"You couldn't say 'belt' because a belt is what you use to hold up your pants."
Posing makes a move more painful
Wrestling is about entertainment, so if you can combine that with your moveset then you're on to a winner.
The Sun write: 'If you're Hulk Hogan or The Rock flexing beforehand then an elbow or leg drop instantly becomes ten times more powerful.'
Contract signings turning into chaos
Contract signings have been a staple of WWE TV for decades. But it's now become custom for a brawl to break out between the two Superstars putting pen to paper.
When was the last time you saw a peaceful contract signing?
It's a popular tradition in WWE for winners of the Royal Rumble to point at the WrestleMania sign.
Yet, Triple H revealed that the company don't tell Superstars to do it, even though all of them do.
"It's funny now, this is a hooky thing that has happened over the years and [fans think] we tell everybody to point at the sign, we don't tell anybody to point at the sign."
The ladder climb
One of the more frustrating unwritten rules in WWE. It seems Superstars take forever to climb ladders.
Despite being incredible athletes, all strength goes out of the window when trying to do something so simple. Where's the logic in that?
Fans aren't marks
Die-hard wrestling fans who buy into characters are referred to as 'marks' amongst themselves.
But Vince doesn't approve of that term and doesn't like his talent using it. Jericho once revealed:
"You couldn't say 'fans' because it's the 'WWE Universe'. And never say 'marks' because [imitating McMahon] 'they're not marks - they're our fans!'"
Well, there are some really odd rules in there.
You'll probably be alright if you remember to point at the WrestleMania sign, or simply avoid calling your championship a 'belt' or 'title'... but NEVER sneeze in front of the boss.
- How Undertaker reacted to his streak ending
- Sami Zayn has backstage heat in WWE
- How Undertaker wants to retire from wrestling