Reminds me of a joke I was once told by a QA consultant:
His colleague was on his way to deliver a revision of software which had been extensively tested and many serious bugs discovered and fixed. The software was so important that it was to be delivered in person by the consultant on a laptop to the customer.
On the walkway to the plane, he happened to glance up and see the aeroplane he was about to board was an Airbus. In fact the very revision that had the same software he'd just been testing and had found to be full of bugs.
Oh no.
Suddenly getting very cold feet and desperately thinking of a way not to get on the plane he takes a drastic step and deliberately drops and destroys the laptop with the software he was going to deliver.
Happy now he returns to the office and declares 'well, that's a shame - but I think I'll take the train next time'
- was told to me as a true story, and you never know...