Roubini, a doomsaying economist who's as well-known for his Tribeca loft parties as his increasingly grandiose predictions of worldwide economic collapse, took a break from wooing young women on Facebook to post a few photos of a copter ride in Brazil. (He simply had to spring for a helicopter "as Sao Paulo car traffic is THE worst in the world.) Check out who he hung out with: New York Times loan shark Carlos Slim Helù, disaster-exploiting hedge fund manager John Paulson, and demise-of-empire chronicler Niall Ferguson. They know all about meltdowns, too!