'Revolver' magazine's fifth-annual Golden Gods Awards, held last night, featured Metallica as the night's headliners. They were joined onstage by special guest Rob Halford, who led the metal giants through a surprise performance of Judas Priest's 'Rapid Fire'.

As longtime fans of the bands are well aware, this isn't the first time Halford has performed 'Rapid Fire' with Metallica. In fact, the first time was nearly 20 years ago, when the group paused during a 1994 concert in Miami to invite the former Judas Priest frontman to take the mic. They got together again in late 2011, when Halford joined Metallica onstage during one of their 30th anniversary shows.

Even if it wasn't entirely unexpected, last night's performance of 'Rapid Fire' served as one of the highlights from a ceremony in which the Deftones won Album of the Year and Tenacious D picked up the Comeback of the Year award. The video below is fairly dodgy -- it looks like it was recorded off a screen that was presumably streaming the awards on Xbox Live -- but it should still give you an idea of what you missed if you didn't tune in.

Watch Rob Halford Perform Judas Priest's 'Rapid Fire' With Metallica