Tough Guy - the safest most dangerous event in the world.
Totally mad - 5000 entrants this year - running 8k before a gruelling assault course - takes place in Perton, near Wolverhampton, UK.
My daughter took part last year with Durham University.
Here is the state of my 5D2 after the event , and a sample shot , more can be seen on:
Fantastic photo opportunities.
Shots taken with 5D2 + canon 16-35mm, and 7D + canon 28-300mm