Ryan Seacrest takes a tumble while congratulating a Wheel of Fortune winner

Here's how it all went down ... contestant Daniel Thomas was trying to solve a 7-letter word on Tuesday night's episode to win $40,000 during the show's bonus round. Ryan kicked things off with the standard offering -- "R, S, T, L, N, E" -- in the "Living Things" category with "S" and "E' appearing on the big board. Thomas picked “H, G, D, O,” but only the letter “G” came up on the board -- but with just 10 seconds to toss out a guess, Thomas improbably nailed the answer: “Guppies.”

Ryan shouted, “Yes, you did it," and got so excited he opened his arms, inviting Thomas in for a hug, and as they twirled around ... that's when everything went awry.

 Luckily, Ryan wasn't injured and was helped to his feet by Thomas.

Photo: Alberto E. Rodriguez / Getty Images Entertainment / Getty Images


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