Define Soy Bomb Meaning

When Bob Dylan played 'Love Sick' at the 1998 Grammy awards, a shirtless man with the words "Soy Bomb" painted on his chest got up on stage and began gyrating around in a bizarre dance, while an unfazed Dylan continued his song. The man, later known as Michael Portnoy, was escorted away by security after about a minute, and it was later revealed that he did it as "an act of revolution", even though several years later people still don't know what the hell it means.

n. semi-solid bodily waste manifested or produced by the vegan dieter.

In addition to the above (below?);
When interviewed, Portnoy explained his term so:
"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."

To interject one's self into a performance uninvited for the purpose of bringing attention to yourself or some cause.