I was in a session at a festival a few years back and this bloke had brought a electro-classical guitar and amplifier in. He was a very good technical player but seemed to have no idea of taste, restraint or listening to what was being played. He just sat there and played incongruous arpeggios and scales at warp speed over every single song and tune set, including an otherwise gorgeous unaccompanied version of "The Unquiet Grave." It got be his turn and he launched into a furious flamenco guitar piece which everyone in the room backed with G, C and D in varying tempos and time signatures. He stopped halfway through, let out a torrent of abuse about how talentless and insensitive we all were and stomped out to hoots of derisive mirth. It was a good session after that!