Keith Moon faced several challenges during the recording of "Won't Get Fooled Again," a track by The Who from their 1971 album Who's Next. One of the primary challenges was his notoriously chaotic drumming style, which often led to difficulties in maintaining a consistent rhythm during recording sessions. His penchant for improvisation sometimes clashed with the band's need for precision, especially in a song that features complex time signatures and dynamic shifts.

Additionally, Moon's personal struggles with substance abuse were significant during this period. His lifestyle and the pressures of being in a high-profile band contributed to erratic behavior, which could disrupt recording sessions. For instance, Moon was known for his wild antics and unpredictable nature, which sometimes made it challenging for the band to focus on the music.

Moreover, the recording of "Won't Get Fooled Again" involved innovative techniques and technology for its time. The band experimented with synthesizers and other effects, which required a level of technical proficiency and collaboration that could be difficult to achieve, especially with Moon's unpredictable contributions.

Overall, while Keith Moon's unique drumming style and personality contributed to the iconic sound of The Who, they also posed challenges that the band had to navigate during the recording process.