Don't be rude. Be a nice, kind guy and be sure that there will be no bricks on your head ahah :)
No need to bargain with me, ask me to reduce the cost of my services. Let's respect other people's work, because you do your work at full cost, without discounts, right?
The most important! Don't ask me to do something for free! I am at work doing my job. If you do this, be sure that the brick is already on your head.