The punk rock band FIDLAR was performing in Berkeley earlier this week when a fan jumped onstage and attempted to take a selfie with frontman Zac Carper. Carper would have none of it, and he proceeded to slap the phone out of the woman’s hand. Back in 2015, FIDLAR actually tweeted a warning of this very thing. i have no problem breaking your iPhone 6 if you jump on stage and take a selfie while we are playing. please, give…