Brock Lesnar went full MMA beast mode on Roman Reigns Sunday night at WrestleMania 34 ... raining elbows on his dome and leaving him a leaking, bloody mess!!
We know what you're thinking ... it's all fake, right?
Well, a lot of fans are convinced Brock's hell-bows REALLY sliced Roman's skull ... but even if Reigns snuck in a cut himself, the whole thing was super gnarly.
Brock Lesnar busts Roman Reigns open with elbows to the head..#WrestleMania pic.twitter.com/turV94P4sP
The Big Dog immediately started gushing like a fountain ... turning the WWE ring into "The Shining" in a matter of seconds.
Wouldn't have been the first time Brock went a little overboard. Back in 2016, he left Randy Orton in a pool of his own blood at SummerSlam -- hitting him with a shot that needed 10 STAPLES to close!
For Roman's sake, we hope this was all part of the script.