When Tool frontman Maynard James Keenan posted a photo looking like legendary Led Zeppelin frontman Robert Plant (below), we knew something was up. The band played their only show of 2015 over the weekend in Tempe, AZ and whipped out their obscure Zeppelin cover of "No Quarter." How'd they do?
Also, they may or may not have played a part of a new song:
Here's another video…
See how other metal musicians dressed up on Halloween here.