Surprisingly, the most popular game by far on "The Price Is Right" doesn't involve guessing the retail price of the big prize. Per BuzzFeed, contestants go absolutely wild when they learn that they'll be playing Plinko. First introduced in 1983 (via CBS), it features a giant pegged board with nine slots at the bottom, each with a dollar amount between $0 and $10,000. By guessing the cost of small prizes, players earn chips that they drop down the board. A really lucky contestant can collect as much as $25,000, whereas a very unlucky contestant might walk away with nothing.

What's the appeal of this simple game? Host Drew Carey once told BuzzFeed, "I honestly think a lot of it has to do with anticipation — just the amount of time it takes the chip to get down to a prize, and how it bounces around ... and the randomness of it." Because it's a game of luck, it also avoids the embarrassment factor. It's one thing to miss out on a pile of cash because the chip pinged off the wrong peg; it's another to miss out on a car because you guessed the wrong final digit of its price.

Whatever the reason, Plinko has been a part of the "Price" culture for nearly 40 years, and on one milestone anniversary, producers decided to do something extra special.