Golf
As a teenager I liked to whack a golf ball around a bit. I was rubbish. To improve I was practising in my garden by knocking tees out of the ground. In my frustration at not being able to do this well I took an almighty swing and my poor grip gave way, launching the club spinning into the air off towards a neighbours driveway at the back of our house.

There was a very dull noise, no screams, no smashing glass, nothing. I went round to inspect the damage to find said neighbour stood next to his car looking very confused, my golf club next to it and a lond black rubber streak down the bonnet. The club had landed grip first on the car leaving nothing but a bit of rubber and no permanent damage to anything or one. Those 30 seconds before I knew all was OK were horrible, the relief lives with me to this day! (He was unbelievably nice about it and I hold a massive amount of respect for him given the potential of the situation)
(el perro grande, Fri 21 Dec 2012, 0:12, Reply)