As much of a waste of time and, well, yes, energy, as the Live Earth concerts will be, at least Spinal Tap is playing, lending the appropriate amount of satire and irony to the giant photo op.

The reunited mock-metal trio will play in London’s Wembley Arena with original Spinal Tap director Rob Reiner in tow. Reiner has filmed a new 15-minute piece on the band’s reunion, which will play on the opening night of the Tribeca Film Festival.