To mark the 10th anniversary of the passing of legendary metal vocalist Paul Baloff, Exodus and a bunch of their thrashiest friends -- Heathen, Possessed and Forbidden, to name a few -- held a concert in his honor, aptly titled Bonded By Baloff.
Among the surprised guests was none other than Metallica guitarist Kirk Hammett, who joined the band for a rendition of "Whipping Queen," a song he co-wrote with the band for their 1982 demo. You can check out some fan-filmed footage below.
Also joining the band for the song was original Exodus bassist Jeff Andrews.