A German fellow in tight swim trunks didn't make quite the splash he was hoping for when an attempted cannonball ended with a painful thud.
The amateur diver's friends shared the entire frozen pool fiasco on YouTube, offering giggles for the Internet and a cautionary tale for ice acrobats. Remember, kids -- butt padding and helmets are recommended for all winter activities.
BONUS: 10 Cringe-Worthy Belly Flops