Picture this: A hotel party thrown by Tony Hsieh of Zappos. A group of people, crowded around a laptop, laughing at a video of a doctor rapping and singing about ulcers. Suddenly one of the group starts rapping out loud to the video. Now people are laughing so hard that they are crying.... This is how I came to know ZDoggMD, a rare - and virtually undiscovered - talent that I would now like to gift to the TechCrunch community.