Hard / brutal songs by artist that usually have a different style?

I am looking for songs by artists or bands that went out of their comfort zones and made one or more songs in metal, punk, hard techno, industrial, whatever.

Even though they usually do pop or dance or more softer rock (or even rap).

It's not the best example for this, but I am totally in love with the original version of "Hallo Spaceboy" by David Bowie. I mean yeah, Bowie did some harder rock stuff before. But Spaceboy is a really brutal industrial metal song, a bit like Nine Inch Nails, and very unusual for Bowie.

Another example: Moby is a fluffy electro-pop artist now, but he made one extreme track at the beginning of hir career, "1000", a super fast and very distorted rave track.

Do you know more songs like this?