Fabio Wardley's reaction said it all as the WBO heavyweight champion was left with his mouth open, arms up in awe at what his fellow Brit and stablemate Moses Itauma had just done.
But, in truth, it wasn't all that shocking. Wardley will know that better than most. He has seen what Itauma can do many times before.
Other heavyweights, such as boxing legend Prince Naseem Hamed, were ringside to witness the prodigy in the flesh.
The Round Five stoppage of Jermaine Franklin Jr. was indeed a sight to behold - the left uppercut knocked Franklin out and had him suspended in mid-air - but it is what we have come to expect from the 21-year-old.
This was the fight to test Itauma's chin and his stamina.
To see how he would handle some pressure.
He and his team actually hoped they would get past Round Two.
It didn't go much longer than that. Franklin, a brave and worthy rival, tried to give as good as he got, but Itauma is too fast, too slick and too brutal.
The winds of change are swirling around the heavyweight division, driven by a fearless 21-year-old and if people did not notice before, they sure do now.
It is not just the knockout showreel which should have his rivals worried, it's everything else, the way he talks, his respectful nature, calm head and general demeanour.
But even now, with 12 stoppages, the calls to fight Oleksandr Usyk, the consistent shuffle up the rankings, and yes, the Mike Tyson comparisons, his feet remain firmly on the ground.
