I had a doctor refuse to pay a bill because it was too expensive.

.5 hr service call to disconnect and remove a stove-top
1 hr service call to install and connect a new stove-top
Total bill was under $200.

Her explanation was that she only gets paid for the time she actually sees her clients. Apparently, she thought that I popped into existence on her door step and popped back out when I walked out the door.