Which can be difficult while you're trying to balance in a precarious stance. This kind of adventure isn't so popular with many of today's climbers, so they start at the top of the cliff and slide down a rope, stopping ever so often to drill the holes and set the bolts. They then go to the bottom of the cliff and begin climbing up. The shiny bolt hangers serve two purposes. Firstly, they mark the trail so that nonbody gets lost. Secondly, today's climber finds them to be kind of attractive, and so he is enticed into leaving the relative safety of having a bolt by his shoulders and into the bold frontier of climbing until that same bolt is by his knees. At that point, he gets to clip the next bolt at helmet level and he may decide to lean back on the rope for a little rest while he admires that shiny little beauty.
I hope this has helped.
phaquin precious!