It was really strange. I was hiking up a rather steep mountain, effectively by myself at that point (because we all went up different ways) and of course it was very tiring, stop and go. What was odd was that as I got to a certain level of tired I would get this wave of sexual desire/energy/feeling that seemed really out of place given the circumstances. I don't know why I got that; maybe that hormone rush that makes you less tired was a little more than just adrenaline...