On one of my first gliding solo's I remember pulling back far too hard at the top of the launch, broke the cable, causing a 1000ft of wire to drift downwind and wrap itself around the nearby hydro electric power lines. The flash, spectacular as it was, unfortunately blew all the power to the local town for 4 hours! To say I wasnt popular was a slight understatement! The moral of the story was we probably shouldnt have been launching in the first place given the wind direction. The club learnt a lesson the hard way, just unfortunate I was the "guinea pig" so to speak. We've since paid lots of money to the hydro to have the power lines buried.