"I 100 per cent thought I was going to be punched in the face but luckily each time he swung his friend was standing in the middle. I have now gotten to the point where I fail to understand why people make excuses for him."
On Monday night Frost revealed he had been struggling with alcohol addiction and was last year reportedly diagnosed with bipolar schizophrenia.
"I am realising now a lot of people around me have been hurt by my behaviour and for that I am incredibly sorry,"he wrote on the band's official page."I have not sought to target individuals or groups. All people around me have been affected by my behaviour during these episodes."
In her post,Thelma Plum also referenced an incident involving Frost at a gig for Indigenous metal band Dispossessed in July.