A fable...the fly in the barn
There was a fly buzzing around a barn one day when he happened on a pile of fresh cow manure. Due to the fact that it had been hours since his last meal, he flew down and began to eat. He ate and ate and ate. Finally, he decided he had eaten enough and tried to fly away. He had eaten too much though, and could not get off the ground.
As he looked around wondering what to do now, he spotted a pitchfork leaning up against the wall. He climbed to the top of the handle and jumped off, thinking that once he got airborne, he would be able to take flight. Unfortunately, he was wrong and dropped like a rock, splatting when he hit the floor.
The moral to the story is:
Never fly off the handle when you know you're full of shit.