How to slackline: 1. Acquire $20.  2. Acquire transportation.  3. Travel to nearest hardware store.  4. Purchase longest 3in webbing, typically called a tiedown.  5. Purchase two healthy oak saplings.  6. Travel home.  7. Plant said saplings a distance from each other slightly shorter than your tiedown length.  8. Care for said saplings, water, fertillize daily.  9. Repeat #8 for a minimum of 20 years.  10.  Attach tiedown to both trees.  11. Stand on your own brand new homemade slackline!