10. Von Wafer
It was 2011 and the Boston Celtics played the Washington Wizards. Wafer, a rotational player who averaged about 12 minutes per game throughout his career, had his moment to shine. He seized the ball and produced a sensational slam dunk to seal the win for the Celtics. Or at least he thought he did. The truth was that he actually smashed the ball off the rim.
However, this isn’t even the most cringe-inducing moment of this terrible play. After believing that he had scored, Wafer turned away triumphantly towards the crowd before accidentally shoulder-barging his own teammate Jermaine O’Neal. Meanwhile, O’Neal had the ball in his hands and lost his balance, which resulted in a double-dribble. In sum, Wafer couldn’t do anything right on this play.

9. Sabri Sediri
French boxer Sediri discovered that showboating is extremely dangerous if you don’t do it right. He fought Sam Maxwell in 2019 and was cruising to victory. It was the final round and he staggered his opponent, leaving him woozy and shaky on his feet. In this situation, Sediri had two options. First, he could have looked for the KO because Maxwell was vulnerable. However, he could also have hung back and kept his guard up.
Woooooow! 😳
Sam Maxwell was losing and being taunted by his opponent all fight and then did this with 10 second to go!
Incredible knockout 👊 pic.twitter.com/qM069RZnQK
— Boxing on BT Sport 🥊 (@BTSportBoxing) March 23, 2019
But Sediri didn’t do either of these. Instead, he dropped his hands and proceeded to dance around Maxwell like a clown. Meanwhile, his opponent suddenly recovered his senses. As Sediri continued to showboat, Maxwell bided his time and smashed the arrogant Frenchman with a right on the jaw with just 10 seconds left. It was glorious but a harsh lesson for Sediri who certainly should have won the match.