Steve ventures into Venezuela to undertake one of the deadliest adventures he'll ever face. His mission is to climb a totally unexplored mountain to find out what animals live at the summit. Isolated for millions of years, the top promises to be a lost world inhabited by creatures totally new to science. Steve sleeps the night in a glorified camp bed strapped to the rockface - above him 200 metres of loose rock and below him 200 metres of nothing. They make great progress towards the top, but then Steve loses his grip and falls from the rock, where he is left dangling in thin air 250 metres above solid ground.