Rocker JOHN MAYER has put the paparazzi on high alert after he was spotted taking a high-energy self-defence class in New York.
Members of a hidden video crew wondered what they were seeing when Mayer fought off an apparent attacker, who was waving a gun at the singer/songwriter's head.
But sources insist Mayer's life isn't at risk - he's just learning how best to defend himself from over-zealous cameramen and fanatics.
The rocker has been a paparazzi target for many years, and now he's dating Jennifer Aniston, interest in him is about to hit fever pitch.
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