Tracy Morgan didn’t leave anyone laughing during a recent afternoon shopping trip to Macy’s. The “30 Rock” star and father of three was in an elevator, along with two sets of parents with baby strollers, when he started to “complain loudly, but with some good humor, about people who bring their kids to stores,” says a spy. “As he continued to speak, his comments became more pointed and nasty. When the families finally got off, they seemed upset and embarrassed.” Adds the source, “One woman chided him for his comments, telling him she’d be looking out for him when he exited at his floor, and he turned around and put his hands to his eyes like, ‘I’ll be watching you too.’ ” Morgan’s co-star Tina Fey recently joked on Jimmy Fallon that with “30 Rock” ending, she’s worried Morgan is “going to fall in a pool or something” once she stops seeing him all the time. “I’m worried about what’s going to happen,” she said. “I think he might die.” Maybe he should just stay out of elevators. A rep for Morgan did not respond for comment.