en_captions: A young man wearing a green shirt is talking about the techniques involved in rock climbing.  Two young men are seen climbing the wall while being suspended on ropes.  There's another young man who is demonstrating how to climb up the wall while holding onto the wall mounts.  The man in the green shirt explain the technique as he points to the wall to show the significance of each rock and its height.  He shows various rocks that are named differently and as assigned different numbers.