An Inventive Mistake

Professor Sir Stephen Mugglewort
Was often aggrieved and badly hurt,
For when he dropped his jam on toast
The jam always landed bottom most!
He invented a bread slicer - very clever;
It sliced at a special angle, so that never
Would the toast fall with jam on floor!
But unfortunately, there down before,
His feet was jam, facing right side up!
His feet went on this, what a smash up!
Banged his head as he tumbled down,
And there fatally, he broke his crown;
Now the moral of the tale is quite clear -
Inventions can cause mishaps dear!