"Third round it started to slow down and I picked my pace. He had been trying for the knockout, I think it was the elbows that slowed him down."
Putting his opponent down in the fourth, Gallacher then ended the fight when a brutal straight right hand left the stunned Angelov knocked out without his body realising it slowly dropping his hands and then sinking to the canvas.
"First knockdown was a head kick and the next one was the 'one-two'."
In his 20th fight and his fifth as a professional, the impressive win was the perfect return to form for the Assassins Guild fighter after being held to a draw in his fight with Pati Afoa for the WKBF New Zealand cruiserweight belt in November.
Gallacher is now training for a trip to Adelaide in six weeks to enter the 8-man "Knees of Fury" tournament.