Client: Hi Johny, we finnaly finished design of our eshop. Half of year of hard work. Can you code it in week? We have deadline. :(
I: Sure, i can code in speed of light.
Client: How about money?
I: Tripple of sallary.
Client: What?
I: My sallary also grow in speed of light.

Some clients can not understand they can't throw shits on my head. Take it, hire someone else or stop giving mi impossible conditions.