Beck was a part of Summersault Festival, a roving festival that went around Australia around the new year in 1995/1996.
Apparently this day, the middle of Australian summer, was "strikingly hot" (37 Celsius, around 99 F).
Beck came on right after Sonic Youth and covered their "The Diamond Sea" as a sort of transition. The Beastie Boys played after Beck and joined him as he beatboxed for them while they did "Posse in Effect" before Beck did some solo beatboxing.
[people and bands
Guitar (Acoustic): Beck Hansen
Other Band: Beastie Boys, Bikini Kill, Blue Tile Lounge, Foo Fighters, Jawbreaker, Jebediah, Outstation, Pavement, Rancid, Sonic Youth, The Amps, Thermos Cardie, Wormfarm
Vocals: Beck Hansen
Vocals (Beatbox): Beck Hansen