Dude in Boulder has to take a pee test for work, and he partakes of the chronic hydroponic, so he's worried. So he buys some "drug free urine" from a local convent of nuns that he saw the ad for in the back of the Boulder People's Republic Weekly News and manages to deposit his sample in the cup without people noticing he's dumping it out of a hydration bladder with the tube running down to his fly under his shirt.
So 2 weeks later he gets a phone call "Yes Mr. Jones we have good news and bad news. Good news is you are drug free. Bad news is, you're pregnant!"