2 incidents do spring to mind. the first being with me and second with a friend. the first a car alarm went off and the horse reared and off i flew out the side door. thankfully i was only a little 6 yo. second time my friend was riding at college and a police car went past. unfortunately the police unit sounded the siren as he came level with the horse which then bolted and flung her into some nice nettles. so what is yours?