In 2012, Manwar Khan saw a brutal beating on an Edmonton LRT which ended with one man dying in hospital.
Needless to say it had a profound effect on him.
From that experience, Khan started the Do Not Be a Bystander campaign, aimed at encouraging people to take a stand when they see violence or bullying.
Khan isn't saying everyone should put themselves in harm's way and intervene physically, but speaking out or helping get a potential victim away from a heated situation is effective.
"You know what? I really cannot stop bullying and violence — I can't do that alone. What I can do is I can create awareness and that is what I'm doing. I'm not sure when I'm going to stop but I will go to every city in this province," he said.
Khan brought his campaign to Calgary on Saturday, with a rally in front of City Hall. So far he has organized eight rallies in the province.
"I'm overwhelmed with the support I'm getting," he said. "When I started I had no idea that it would come."