The World Premiere of the Amiga (1985, Andy Warhol, Debbie Harry)

I mean, some people show up to the blow out party three years after it ended, sure. That they're still talking about it 33 years later gives you an indication of what the main event must have been like ▶ this video link

The Mandrill was part of the launch event of Amiga in 1985 at the Lincoln Center. The event also included other famous demos, such as the bouncing ball. ▶ this video

"The World Premiere of the Amiga (1985, Andy Warhol, Debbie Harry): Possibly wanting to one-up the Apple Macintosh launch in 1984, the Amiga 1000 debuted at a black-tie event held at the Vivian Beaumont Theater at Lincoln Center in New York City on July 23rd, 1985. (...)" Warhol paints Debbie on stage: ▶ this video