Today, everyone does everything. You have actor-writer-rappers (Donald Glover, Jamie Foxx), dancers turned actors (Jennifer Lopez, Channing Tatum), pro athletes attempting to rap (Shaq, Allen Iverson), and so on. So, when Rafael A. Perez, a San Diego realtor, decided to produce a rap video to "express the state of real estate" there, who was going to stop him? Yes, the housing market in the U.S. collapsed a few years ago, but R.A.P. (Rafael A.