Bruce Dickinson chastised fans who were smoking during his April 27 concert at the Opera Hall in Brasília, Brazil. The Iron Maiden frontman, who is out touring in support of his recent solo album, The Mandrake Project, became irate when air quality began affecting his performance. “I can’t fucking breathe. Tanya [O’Callaghan, Bruce’s bassist] can’t breathe,” the singer declared (as transcribed by Blabbermouth). The metal legend then directed his attention to one fan in particular. “You with the fucking vape over there. Yeah, it’s not you, but, please, fucking do that outside, all right? You kn…