On Vancouver's Skytrain last week, Ehab Taha managed to capture a moment that he described as "the most incredible display of humanity".
Writing on Facebook, the British Columbia resident said that "a six foot five man suffering from drug abuse and\or mental health issues" became very aggressive and erratic on the bus, cursing and shouting.
While most of the passengers were understandably apprehensive, one brave woman saw someone who was struggling and was moved to reach out.
"While everyone was scared, this one seventy year old woman reached out her hand, tightly gripping his hand until he calmed down, sat down silently, with eventual tears in his eyes," Taha wrote.
Every time the man became agitated, the woman would look at him and calm him down and Taha took the opportunity to take a photo of the encounter.
After 15 or 20 minutes, the bus arrived at the man's stop. He got up and said "Thanks, grandma", before getting off.
Taha then thanked the woman for her actions, saying that the world needed more people like her.
She started to cry and explained that "I'm a mother and he needed someone to touch." She also said that she didn't want him to feel so alone.
Taha's Facebook post has since gone viral, having been shared almost 30,000 times.
"(The photo) resonated with people," he told CTV News. "It's incredible to see that sometimes human touch can do so much more than anything else.
"I don't know if all of us are that selfless," he said. "I don’t know if all of us would put someone else's needs above our own."