Cris Kirkwood, who also appeared on Nirvana's Unplugged record, pleaded guilty to the assault, which happened after the bassist had argued with a woman over a parking space. The security guard - Thomas Goodrum - stepped in, only for the two men to tussle. Kirkwood eventually struck Goodrum over the head with the guard's own baton.
Kirkwood, 43, was already on probation for a previous drug-related offence.