I used to give it away at prep school for kids on the refer who were about to get the boot. At that time I had never even tried it and everyone knew I was clean. However, one time a d00d wanted me to pee in a viseen (sp?) bottle but he didn't clean it. The test came out all screwy cause of teh chemicals in the viseen (again I have no clue how to spell that). So they started the tried and true method of have a nurse watch you pee. So that made things all complicated. Lots of friends got kicked out cause of failed urine tests but not with my pee. I kept a few in the school.
End of story. Not very funny though. Sorry.