One time I was in a band playing a benefit on an outdoor stage on a windy day. They'd flown bunches of balloons off the corners of the stage, and the wind was pretty much blowing them straight to the side. The wind eddied a bit around our bass player, and before you knew it the cord from the balloons had wound around him twice and was dragging him off the edge of the stage (a six-foot drop). Nearly something out of Spinal Tap.
(No bassists were actually harmed in the making of this story.)
(In the picture you can see the nearly horizontal string on the balloons.)