Slack Lining

For those who don't know what slack lining is:

It's like tight-rope walking except the rope isn't tight. You set up webbing between two immovable posts (like trees) and even though you pull it as tight as you can, the nylon webbing still gives when you put weight on it. So it's actually more difficult than tight rope walking because the line is always moving as you're walking across it. When my brother and his friends set up the slack line in the park, other people in the park just sortof stop and stare. It's really cool. I suck at it, but my brother does it really well---he's smooth and graceful.