What does 'drumming for Spinal Tap' mean in?

Question

What's a more dangerous profession, heading up an American company's presence in China or drumming for Spinal Tap?

Answer 1

Spinal Tap was a comedic film done in the form of a documentary of a heavy metal band in the 1970s and 1980s. In the movie, the drummers had a hard time staying alive. One even died of spontaneous combustion on stage.

It is a funny film -- but drumming for the band is a dangerous job.

When you listen to them play, make sure you turn the amp up to 11.

Answer 2

...take a sad song, and make it better...