We’re in the jungle now: the track, if you can even call it that, slopes steeply downwards over roots and moss clad boulders. Except for the track there’s trees and plants all around, you can only see a few meters in front of you. Despite not having rained for several days, everything is damp, the track muddy and the rocks and trees are slippery. All around is the sound of insects and in the distance the rush of a waterfall. I have a nylon strap harness strapped to my legs and shoulders, two safety cords and a zip line pulley hooked to my right hip. On my back is the small backpack containing everything I need for two days of trekking and zip lining through the jungle. My mind is brimming with anticipation.