Muracchini was heading to work by public transit in São Paulo, Brazil, last Monday when she noticed a man step aboard clutching a suspicious cardboard box. As she later described on Facebook, the man appeared to be nervous — and Muracchini noticed that the box was moving.
Not surprisingly, it made her anxious.
"I'm already thinking about what he might have in there," Muracchini wrote. "I'm extremely worried ... until I hear the first bark."