Let It Bleed
UPDATE: The link is sadly now broken, but for what it's worth, it was video of a shirtless Keith Richards on stage with the Rolling Stones in 1981, in the middle of "Satisfaction." A crazed fan gets past security and on to the stage. Richards removes his black Telecaster Custom, wields it from the neck like a bat, and viciously swings at the fan, landing three or four blows, while the band keeps playing. The fan runs away. Richards puts the guitar back on, turns up the volume, and continues playing.