Mom, the Janes are fighting again! At Friday night’s concert in Boston, Jane’s Addiction singer Perry Farrell punched guitarist Dave Navarro on stage in the middle of a song, reports several outlets, including Rolling Stone. Footage from the concert shows Farrell walking up to Navarro as he’s shredding on the guitar, and as he gets closer, he throws one punch on his arm before hitting him again. A crew member intervenes, and an agitated Farrell walks off stage.