I’ve never actually tripped…like on magic mushrooms or something…but I have tripped over things on the floor.  So when I first heard the story of the the thirty foot by one foot plank placed on the floor that everyone could easily walk over, I thought to myself…maybe. That however wasn’t the point of the story and for those who’ve never heard it – here it is. If said plank were on your living room floor and someone said I want you to walk the plank. it’d be a piece of cake.  You wouldn’t give it a second thought.  Easy peasy. What if same plank were strung between two high rise buildings some fifty feet or more in the air, what then?  Could you walk across it with the same aplomb? (I’ve been waiting to use that word for ever.) The answer is, it’s doubtful that you could. So what’s the…