Tool dressed up as Led Zeppelin on Halloween night to perform "No Quarter." Here is the video.

On Saturday night (Halloween, of course) Tool dressed up as Led Zeppelin to perform "No Quarter," a Zeppelin track Tool has covered in the past, at the Monster Mash Music Fest in Tempe, Arizona. You can check out their performance, in addition to a portion of what some say is a new Tool song, via the videos below.