If you're looking for an unusual way to injure yourself next month, consider the Tough Guy event held twice each year in Staffordshire, UK. This is a charity event known for attracting those who are unhinged to varying degrees, and the course will give you an idea of why.
Having warmed up with a leisurely 8 'country' mile run (think rugged terrain), you'll be battling 20 obstacles, including:
Wading through hip-deep dirty water
Scaling a 30-foot wall of straw
Slithering through used sewer pipes
Scrambling under barbed-wire fences
Leaping fiery ditches
If you're intrigued, entries for this July's event (on the 30th) are open until July 26. Oh, and there's only been one death in the event's 20 year history.