As a child of the 90s (kinda), seeing Nirvana punking Top of the Pops in 1991 was amazingly awesome.
The band was told that they’d be playing over a track (which is of course what 99% of the “live” performances by big artists these days are), and not being too happy about that that the band basically mocked the whole thing, with Cobain singing in a weird affected voice and the band barely pretending to play their instruments, much less in time with the music.
It’s an epic performance.