Anthony Mundine and Jeff Horn had to be postponed in the official pre-war match when a 43-year-old veteran struck the opponent's face.
Mundine looked lifted and screamed as he took the weight for official reading of 70.25kg.
The Horn, which looked significantly larger, came to 70.5 kg because both fighters had reached an agreed weight of 71 kg.
However, when the couple got out of their nose, they broke out during the last frontal arc. Horn seemed to lean forward, and something was whispering into the ears of veterans, causing Mundin to thrust him back into his throat and send him to throw him into coach Glenn Rushton.
Mundine had to be detained by his coaches as he began to tear Horn.
"I just fired a man, I did not mean anything wrong, I'm a left cage now," Mundine yelled.
"I'm ready to eat."
The agreed weight of 71 kg was a matter for the Mundin camp, the former world champion traditionally fought between 76-80 kg.
The Horn camp demanded severe punishment if one of the fighters could not make a weight. Mundine faced the prospect of coughing $ 350,000 for the first kilogram over weight and $ 500,000 for the next after.
The 30-year-old did not seem to avoid a veteran explosion that shrugged his shoulders as frustrating as he came slimmer than usual.
"He has to try to pull the weight there," said the 30-year-old.
"I'm usually in the position he's … this time I feel good."
35.000 for Horn vs. Mundine
Horn is about to restore his reputation after the humiliated defeat of American Terence Crawford in June.
Mundine is opposed to the latest professional fight for an 18-year career.
Friday's fight is scheduled to begin at about 9:30 with an expected crowd of about 25,000 people.