Cowabunga!
WARNING: Don't watch this video if you're arachnophobic. This spider took up residence in the Accidental Watermelon Patch at the farm. When I tried to take her photo, she started doing this bungee thing on her web. I'd walk away, she'd stop. I'd get close, she'd start bouncing. SHE'S moving the web, not me. Gee, I never realized I had that kind of an affect on spiders!