At that rock festival, nudity, free love, experimental drug use, profanity, the peace sign inserted in the Mexican flag and the presence of the American flag so scandalized the conservative Mexican society that the government imposed cultural curbs to La Onda, and especially to rock music. The media called the move "El Avandarazo". The festival, intended to emulate Woodstock and Altamont, expected to attract a maximum of 25,000 concertgoers but about 300,000 showed up. The government helped some stranded attendees at the end of the festival by sending 300 buses.