10 World’s Strangest Extreme Sports You Didn’t Know Existed (5 of 6)

Underwater Hockey (a.k.a. Octopush)

No ice, no skates, just snorkels, fins, gloves, and short sticks. Two teams push a heavy puck along the pool floor toward a goal. Everyone takes quick breath breaks at the surface, then dives back into the action. It started as off-season training for divers and evolved into a legit international scene with world championships and extremely toned calves.

Extreme Ironing

Have you ever needed your shirt ironed, but you unexpectedly found yourself on a huge cliff or in the middle of a lush forest? Yeah, me neither, but it’s a thing! In the game of “extreme ironing,” competitors lug an ironing board to extreme locations (mountains, forests, canoes, and even underwater) and press shirts to perfection. They’re scored on location difficulty, their personal style, and, of course, how well the job was done.