A global computer outage at Delta Airlines early Monday grounded all of the airline’s flights around the world, leaving millions of travelers stranded. The glitch even led one gate agent to issue boarding passes by hand. One of those stranded was “Saturday Night Live’s” Jay Pharoah, best known for his dead-on impersonation of President Obama. He passed the time by rapping. “We can’t take off – cause we on Delta flights – we ain’t going nowhere,” he sang.