I played soccer for the RPI Engineers for 4 years when I was in college. We had an awesome team. Good enough to reach the NCAA tournament a couple times and good enough to win some games in it. After a NCAA game, players are randomly selected for drug tests and are forced to give urine samples. I was one of the lucky winners one year. The unfortunate thing is that after running for 90 minutes, I had no fluids left in my body and could not produce. The NCAA anticipates this and they give you buckets full of juice and other liquids that you can drink. So I started drinking. A couple hours later, I was successful. One problem though, if you drink all that liquid, your urine is so diluted that they cannot use it as an adequate sample. I stopped drinking. That night, I ended up in a hotel with NCAA officials standing over me and waiting until I had to take a leak. Oh, and by the way, we lost that game so we weren't even advancing. Eventually though, I succeeded. Never once did I throw a sample at them.
Oliver Kahn did. I feel his pain. Free Kahn.