In a new trailer for Ron Howard’s forthcoming documentary, The Beatles: Eight Days A Week The Touring Years, the band reveals the personal price exacted as the world went crazy for the Fab Four.

"We were kids," Paul McCartney explains. "We were all pretty scared… We all started to get pretty fed up. We were looking for somewhere new to go."

"We can't go on forever as four clean little mop-tops playing She Loves You,'" says Ringo Starr, paraphrasing feelings about the heady days and nights of fifty years ago, when the band truly seemed to be working Eight Days a Week.

Both surviving Beatles assisted with the production of the new film, along with Yoko Ono Lennon and George Harrison's widow Olivia.

The film features live concert footage from 1962–1966, after which the band decided to quit touring and continue only as a studio entity.

The documentary will open in American theaters on September 15 and  will be shown on Hulu on September 17.