After "Ponderosa" Harv Teitelbaum saw an arborist on television talking about a new sport he'd just invented — recreational tree climbing — his life was never the same. Recreational tree climbing uses a harness, arborist rope and special techniques to safely climb into trees. Teitelbaum met the arborist and trained under him, and now he's the Evergreen man behind Tree Climbing Colorado, an affiliate in good standing of Tree Climbers International. Private climbs are available for booking at $25 to $30 per person; individual basic tree-climbing courses, which are designed to teach potential climbers everything they need to know to climb on their own, are $450. You could use the tree in your mom's back yard, of course; just try not to break any limbs — yours or the tree's.