Not as stupid as the 2010 Australian federal election, but a close contender:
A Turkish groom celebrated his wedding by unleashing a volley of rapid aerial shots with an AK-47. He then lost control of the rifle, killed his father, two of his aunties and wounded eight other people.
Lesson learned: celebrate the joy of being married by eating frosted cake.
We can all attempt to do the same on the evening of 21 August 2010.