Ever worked on something for too long and after long nights and lots of work you think "mmm yes, this project will end soon, i reckon sometime next week"?

Then it will go all wrong, and you will find that all the bugs that wouldn't reveal themselves till that time, will be detected during the last week.

Also when you _think_ that you are in the last development week, you are bound to remember things that need implementation but you decided to "save for later".

So nothing really ends without working till the early morning hours during the last weeks, eh?