Whenever I see a tree that is climbable, it must be climbed. Sometimes when I'm on a run, I'll just run up a tree, jump on a branch and swing off. My favorite tree, in Saratoga, gets me a good 75 feet up.
One third of the economy goes through 'QuickBooks' in terms of businesses invoicing other businesses. Each invoice contains a connection between vendors, suppliers, and customers, and also the price of that connection. Representing the payment graph is huge opportunity and something no other company can do.