Another thing I did only a few times, but if I had had the time I could have got into was; potholing, squeezing through tight confined dirty wet places in the dark, It felt like what I was made for.
For those that don't know here is a short lyrical film
http://www.youtube.com/watch?v=tHtLDfb0slI
For those that don't know here is a short lyrical film
http://www.youtube.com/watch?v=tHtLDfb0slI