But Lesnar's smile was quickly wiped off, courtesy of Vince McMahon. According to Pro Wrestling Sheet, Lesnar and McMahon got into a confrontation backstage - with sources saying that The Beast Incarnate threw the championship belt, apparently at Vince himself.
At first, details were scarce about what Vince wasn't happy about. But according to PWTorch.com (citing sources), the WWE chairman was angry about the amount of blood "from stiff elbows, rather than bleeding." Vince apparently did not give the green light for Reigns to bleed tat much.
On top of that, Vince was livid when Lesnar hit Reigns with an F5 on the German announce table. PWTorch said this wasn't approved beforehand, and the German commentators weren't prepared for it to happen.
But whatever tension there was between Vince and Lesnar, it's likely well behind the two by now. On Monday, Lesnar signed a new contract with the WWE - and he'll defend his title once again vs. Reigns at the Greatest Royal Rumble pay-per-view on Apr. 27.
The story goes that Jericho thought Lesnar's vicious beating on Orton was legitimate, and the two starting shouting at each other before they got tangled up against the wall. Vince and Triple H had to break up the instance, with the former informing Jericho it was all planned out.
It's nothing new for WWE superstars and officials to get into arguments backstage, but this Lesnar-Vince altercation was certainly something else - given that it's a big no-no to go off script, especially at WrestleMania.