I bet you were wandering in a field one day, just idly carrying a big stone, like I was yesterday. Then you saw these two birds, just sitting there, waiting to be killed. Of course, you looked around for another stone but the field was stoneless, was it not? You were then forced to use the one stone you had against those birds and so in a mad blind moment of frustration you just hurled that stone, didn't you, only to find that it missed both birds and went straight through the window of a tractor. Then the police got involved and your life was ruined forever, like mine was - am I right?