Soy Bomb
Halfway through Bob Dylan's performance of "Love Sick" at the 1998 Grammy Awards, a background dancer named Michael Portnoy ripped off his shirt, ran up next to Dylan, and started flailing around violently with the words Soy Bomb written across his chest. Dylan ignored Portnoy and went on playing without missing a beat. Portnoy continued to "dance" for about 40 seconds until security realized he wasn't part of the show and escorted him off-stage.
After his performance, the Grammy Awards declined to pay Portnoy's $200 fee for the dancing gig, and chose not to file charges against him. Portnoy had been hired to simply stand in the background with other dancers and bob his head to the music, contributing to the "cool vibe" of the song.
When questioned by reporters, Portnoy made statements about being "almost vegetarian", and said that "Soy Bomb" means "sort of life and death and explosion" according to The New York Post, and "Soy...represents dense nutritional life. Bomb is, obviously, an explosive destructive force. So, soy bomb is what I think art should be: dense, explosive art" according to E!.
A few days later, TVT Records created a website for "Soy Bomb Nation" as a publicity stunt. The website claimed, more or less, that Soy Bomb was actually a grassroots dadaist anti-corporate movement that had been around for years, and that although Portnoy wasn't officially a member, he was honoring Soy Bomb with his performance.
Since "Soy Bomb", Portnoy has gone on to become a performance artist in the New York scene.