"I just don't care whether you need one life or many to complete the project. I want it done today!"
Your bosses know very well about how tough and time consuming that task is but still they close their eyes and give you deadlines which are impossible to be met. And you have to say 'Yes' to save your skin. This is because if they agree with you, but their superior will not agree with them. It is a chain system which is really so ridiculous!