Ever heard of the belly-button test?

Nope? Me neither.

Apparently though, this test is your handy way of knowing whether Deontay Wilder has just hit you with a knockout punch or not.

In an interview with Sky Sports, Wilder’s trainer Jay Deas sat down to talk all things American.

His initial thoughts were on the origin of punching power, claiming: “Punching is God-given to a large degree. You can improve punch power through conditioning and proper technique by about 10 to 13 percent. But most of it is God-given. One guy hits someone and something happens - another guy hits someone and nothing happens.”

This is where he attributes most of Wilder’s success, claiming he has always been a wild puncher who may look unorthodox, but can spark anyone out at a moment’s notice.

In other news water is wet.

Deas was a lot more insightful when quizzed on his gym secrets, where he introduced the world to ‘The Belly Button test’ - how he measures the power of Wilder's punches in training.

He continued: “If Deontay hits you with a right hand and his belly-button is facing you, it's so-so.

"If he hits you and his belly-button has turned a quarter to Deontay's left, it's a very good shot. If he hits you and his belly-button has turned almost completely sideways to the left, it's a knockout punch.

"It's about the torque of the waist and the turn of the back foot coming through the hip, and the deltoid protecting your chin.”

Wonder if AJ is taking notes...

Many thought they had seen the whole arsenal of the 40-fight veteran Wilder now, but Deas suggests there is more to come still from the Bronze Bomber:

“His left hand is very strong with the hook but he hasn't had the opportunity [to use it in a fight]. He also has a tremendous left hook on the inside, and a left uppercut but he hasn't had a chance to show it yet.”

If he has another hand to add to his game, the rest of the division could be in for a thankless task chasing him down.