Perry Farrell punches Dave Navarro on stage during Jane’s Addiction concert

Jane’s Addiction’s reunited concert in Boston ended prematurely Friday after singer Perry Farrell punched guitarist Dave Navarro onstage in the middle of a song.

As seen in the concert video, during a performance of “Ocean Size,” Farrell became agitated for some reason, walked toward Navarro, and struck the guitarist in the back with his shoulder. Farrell, aggressive and still angry, continued to yell at the puzzled Navarro, and the singer eventually managed to land a punch right on his shoulder:

“What the hell?” Navarro asked as a crew member held Farrell back. When the singer tried to get around the crew member and hit Navarro again, two other crew members and even bassist Eric Avery ran to hold Farrell back and take him backstage. Navarro eventually left the stage as well, and the show ended after 11 songs, three or four songs short of a typical show so far on the now-threatened Jane’s Addiction reunion tour.

According to VarietyWhat happened between the band members onstage in Boston had been brewing since the Core Four’s first joint tour in 14 years, which began in August. On previous stops, Farrell’s lengthy banter with the audience visibly frustrated Navarro onstage. Variety also notes that several concert critics mentioned that Farrell consumed a bottle of red wine on stage throughout the performance.

However, none of the early incidents—including two shows in New York earlier in the week—were any indication of what happened in Boston: JamBase reported that the trouble began during “Mountain Song,” with Farrell yelling at Navarro. The bickering continued through the next song, “Three Days,” and culminated in the punchline “Ocean Size.”

Jane’s Addiction has yet to comment on the confrontation, and Avery’s Instagram — which often posted while the band was on tour — also didn’t mention the incident. However, Farrell’s wife Etty wrote a lengthy explanation on social media that broke down the situation.