Rick,I've never lost a guitar part onstage (I guess I'd have to own a guitar before that could happen) but I have had the horrifying experience, while singing, of watching a wee gobbet of spit escape my chops, catch the stage lights, sparkle and twinkle through the air, and land on a poor soul in the first row.
Given the strict Canadian sanctions concerning premature bridge pin ejection, I'm afraid to ask what penalty covers unauthorized salivary ejecta. All the same, I eagerly await your response.
Dave