The festival was paused for 30 minutes before play resumed and Green Day began their set.
Monroy was the director of In Fact performing arts company located in Portsdale, Brighton.
An acrobat fell to his death at a music festival in the Spanish capital Madrid late Friday, moments before the USA band Green Day took to the stage. "A very fearless artist named Pedro lost his life tonight in a tragic accident", the band tweeted shortly after their performance.
Event organisers released a statement following their performance apologising for the accident and confirming the festival would continue "for security reasons", a decision many attendees criticised as "insensitive".
The organizers said in a statement they had chose to continue with the music program for "security reasons" and offered their condolences to the man's family. Thoughts go out to the family of the performer. "I love you Pedro, your happiness, your strength, your wisdom, keep flying over us".
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The group's MD Stephen Littlechild said the firm's thoughts were with her family, friends and colleagues at this hard time. The son then alerted a family friend, telling them: "My mum's mouth is covered in blood and she is not breathing".
His sister confirmed his death in a post online.
They said: "Mad Cool Festival regrets the bad accident suffered by an aerial dancer during the second day of the festival".
Fans have slammed the punk band for continuing the show, with one writing: "I'm ashamed of you".
"He was doing what he liked most, a show at Mad Cool". "We send our most honest condolences to all his family".
Today (8 July), the festival will pay "an emotional tribute" to Aunión. "We are torn apart".