Imagine being told to cross a busy road. Why should that be a problem? Don't all of us have to do that nearly every day? But what if, at the kerbside, you were obliged to wear earplugs and put on a blindfold? Then you would be extremely reluctant. You would do all you could to avoid ever being faced with such a scary situation again. It may seem as if you are back to where you once swore you would never return. But this time you are equipped with all that you require for a successful expedition.