Rieley arranged for the group to appear in a series of commercials with the tagline "It's now safe to listen to the Beach Boys." He also arranged a guest appearance at a Grateful Dead concert at Bill Graham's Fillmore East in April 1971 to foreground the band's transition into the counterculture. For their performances this year, the Beach Boys enlisted a full horn section and additional percussionists. A journalist who attended the show later reported that Bob Dylan, who was watching from the sound booth, remarked aloud, "You know, they're pretty fucking good." Contrary to what is later written of the show, the Grateful Dead's audience was unfavorable toward the Beach Boys' appearance. On May 1, the band performed at "The Peace Treaty Celebration Rock Show", an anti-war rally concert organized by the Mayday Collective, with approximately 500,000 people in attendance. Footage of the band performing "Student Demonstration Time" later appeared in the 1985 documentary "An American Band".