Tim Monteith was a puppeteer from Season 4 of America's Got Talent. He was eliminated in the audition round.
Background
Tim Monteith is a painter and a puppeteer performance artist. He was briefly spotted in Season 1, although it is unknown if he got to audition.
Audition
Tim Monteith's audition in Episode 402 consisted of dancing while controlling two human-sized puppets to create the impression three women were dancing on the stage. Piers Morgan, Sharon Osbourne, and David Hasselhoff all buzzed the act. All three judges voted "No", eliminating Tim from the competition.
https://www.youtube.com/clip/Ugkx99WMpwC-tfVh2XItqiVae0lp3wM9Oph_