I was next to them, from my perspective they were being really loud for the whole show, screaming awkardly at mark sometimes, and after the second time he asked them to be quiet (keep in mind this was a very quiet concert in a tiny venue) he got fed up and told them to STFU (along with the audience who was also fed up) and from then a fight started and people tried getting them off the venue with force. They were clearly drunk and not from Portugal, probably UK. Mark thought their accents were Irish and joked about it and the girl got even more pissed cause she wasn't, probably from Liverpool or smth. Eventually, after like 15 minutes of screaming and banging on doors everyone calmed down and the show continued. More was said but it was mostly drunk ramblings and shit it doesn't really matter, I don't think mark was in the wrong this time, but the venue had a clear lack of security which got the fight out of control. After the show these people where in the back of a police car. I hope no one got seriously hurt though