More Cowbell

Without any DOUBT the most unforgettable and legendary sketch ever coming out from an episode or show of SNL. The members of Blue Oyster Cult are on the rehearsal while recording "Don't Fear the Reaper" but the producer of the song, The Bruce Dickinson (Christopher Walken). wants to shape things even more greatly thanks to the use of the cowbell.

Description from SNL Fandom Wiki, CC BY-SA