He also revealed the "very strange" way he was taught to play the songs for the film
Bruce Springsteen, Rod Stewart and Faith Hill are among those to make an appearance in the MMA drama
The film, described by The Boss as an "anti-biopic", arrives later this month
The Spingsteen biopic is released in cinemas next month
The Boss took to the stage after a screening of his new biopic 'Deliver Me From Nowhere'
The masked band are midway through a US arena tour supporting new album 'Even In Arcadia'
“There is a problem with the language that they’re using and the way they’re trying to reach people"
"A lot of people bought into his lies"
"This was going to be a film so far removed from the mythology of the rock star"
It was the first event attended by both men since their public feud over the summer