Re: I too have had that
you need a stark *"oh sh**t" moment at some point in your life to make you realise you are not invincible, god of the opposite sex or god of computers..or perhaps all 3 at the same time.
It adds a dose of realism and consequence to your lack of attention.
Like upgrading an ms exchange environment using the disc at hand and only realising at the point the mailboxes don't all convert that somehow you have a standard version rather than enterprise.
oops