im not sure about worst.. but most interesting way of being paid!. I did a flyer for wonderbra once:
http://www.reese-design.co.uk/freelance6.html
> my boss knew the girl who worked for wonderbra and she asked him to find her a designer for above flyer. Boss suggests me, and so therefore I design the flyer.
a few weeks later my boss sheepishly hands me an open package.
I was paid in underwear for doing the flyer!
the boss said his wife opened the package as it was sent to his house!! do i believe him?