Celebrating a victory is a very normal thing to do. You won the game, and you should be proud of yourself! Once the game is over and you’ve secured your victory, feel free to party and celebrate all you want.
But make sure that the game is over. If you get caught celebrating a victory too early, well…something like this will most likely happen.
Next time you are thinking of showing a little hubris, remember these boys. They thought they had the game all wrapped up, but alas, they did not. What a sick shot!