It's a race series thats going around the country. 2 people on a team, you start together, one runs , the other rides a bike. When you get to the first of four obstacles the person on the bike leaves his bike, does the obstacle and starts running.When his team mate gets there he or she does the obstacle hopes on the bike and goes to the next one. You leap frog each other till you get to the end. A MUD PITTTTT thats like Quicksand. There is a cargo net over it , so you and your team mate have to crawl thru the mud to the finish line. They had over 1,000 teams last year. Orlando was the smallest event. For more info google muddy buddy.