I told people I was a drummer before I even had a set, I was a mental drummer.

On 15 December 1969 he joined John Lennon's Plastic Ono Band for a live performance at the Lyceum Ballroom (now the Lyceum Theatre) in London for a UNICEF charity concert. According to Entwistle "That toilet was just dust all over the walls by the time we checked out.

He gained acclaim for his exuberant and innovative drumming style and notoriety for his eccentric and often self-destructive behaviour earning him the nickname "Moon the Loon". Moon joined The Who in 1964. Moon was known for dramatic suspenseful drumming—often eschewing basic back beats for a fluid busy technique focused on fast cascading rolls across the toms ambidextrous double bass drum work and wild cymbal craKeith Moons and waKeith Moons.