A trio of Minnesota friends wowed the judges on "America's Got Talent" this week with their intricate Rube Goldberg machine.
Calling themselves Hamster Wheel, St. Olaf College physics professor Jason Engbrecht and alumni Bryce Danielson and Christian Weeks made their debut on national TV this past week.
The trio are makers of Rube Goldberg machines – overly-complicated, domino-effect style contraptions used to perform simple tasks (think Wayne Szalinski in "Honey I Shrunk The Kids").
Their latest creation took them 300 hours to make, and left three out of the four judges suitably impressed enough to give them the green light to go through to the next round.
"You did it! Well done. You know what? I was really on the edge of my seat thinking, ‘I really hope this works.’ I like things like this," Simon Cowell said.
Fellow judge Howie Mandel added: "I love these Rube Goldberg devices. I feel like I’m at some sort of science convention and you guys are winning. I give you a yes, I liked it."
Former Spice Girl Mel B also gave the thumbs up, though supermodel Heidi Klum said it was "very boring."
Hamster Wheel also designed a Rube Goldberg machine for 3M, which went viral in 2015.
Here's their "America's Got Talent" appearance.