John Cale and Moe Tucker reunited recently for a keyboard-banging performance of "I'm Waiting for the Man," a track off their 1967 debut, The Velvet Underground and Nico. Cale played a Kurzweil and sang Lou Reed's part, while Tucker played the woodblock along with Cale's band, as part of the Grammy Salute to Music Legends concert. Take a look: https://youtu.be/ehI9xGMMdPU The show, which also features the artists playing the LP's "Sunday Morning," will air as a two-hour special on PBS' Great Performances Friday at 9 p.m. local times and will be available to stream on the Great Performances website.