You look at the ad, curious, but hesitant. You spend several hours just thinking about it, wondering if it's worth it. Finally, the need for money outweighs the chance that it might not be a legitimate ad. You drive downtown and bring the ad to the address it says and in you go.
Inside is a young woman sitting behind a desk. She doesn't say anything, she just smiles and takes thew ad from you, handing you a clipboard in the process. You fill out all the needed medical information and sign your name at the bottom. After a moment, you're led into another room, a man standing in front of you.
"So, what do I have to do?" You ask.
"Nothing," replied the man, jabbing a needle into your arm. "Just let it happen."
You flinch and pull away from the needle, but the liquid has already been injected into your veins.