All Music Guide: The KLF

"Voted Best British Group by BPI and the Brit Awards, the KLF were scheduled to perform at a London awards ceremony on February 13, 1992. Cauty and Drummond did show up, but horrified the formal audience with a hardcore thrash version of "3 A.M. Eternal" (performed with the justifiably named Extreme Noise Terror) that also included Drummond spraying the crowd with blanks from an automatic rifle and the post-performance announcement, 'The KLF have left the music industry.'"

Thanks to Philos for digging all this up!