It's no secret that Gary Moore's relationship with Thin Lizzy was troubled, to say the least – with the band's well-documented substance abuse and its impact on their performances being one of the main points of contention.
In July 1979, Moore famously stormed off stage mid-tour after the band's set in front of 63,000 people at San Francisco's Day On The Green Festival. While the departure may have come as a surprise to many, Moore had already decided that, frankly, he had had enough.
