XD I remember that.
Halfway through his song, the auidience starts booing and throwing trash and Beaker "Mee mee mee-mee"'s angrily at them while gesturing to the crowd with one hand while using the other to grasp the mic. Behind him the EM looked confused and put off, especially Animal who comes down from his drumset and screams "QUIET!!!" before retreating and the song continues.