"It came from nowhere," says passenger Emma Gustafsson of the moment when the bus stopped. "We didn't know what was going on. But then we saw that he walked up to a crying girl sitting on the road. It was really cute." Gustafsson took a photo of the incident, which she shared on Twitter . After four days it had been retweeted 4,600 times and marked as a "favourite" by 7,300 people, with a further 50,000 interactions on Facebook.