Oops!

In 2015, Price Is Right model Manuela Arbeláez went viral after accidentally giving away a car.
NBC explained the mistake as, “Contestant Andrea had three chances to guess the right price of a new Hyundai Sonata SE out of five price tags on the big board. But when Arbeláez pulled back one tag to reveal that the first guess was wrong, she went on to randomly pull back another tag — the winning one.”
Arbeláez immediately realized her mistake and recoiled as the contestant claimed the car.
However, both Arbeláez and host Drew Carey said later that it was a simple mistake, and made light of the whole thing.