Georges St-Pierre was picked on a lot as a child, which led to him taking up martial arts and, eventually, starting an anti-bullying foundation.
In an interview with Hot 97, the UFC icon recounted seeing one of his former bullies begging in the street and how he encouraged the man to change his life for the better.
"I don't know if he was homeless, but he was asking for money," St-Pierre said. "... I said, 'What are you doing here?' (He replied) 'Can you help me? Things are not going well.' Well I'm like, 'Man, what are you doing here? You're a tall guy, you're good looking, what the hell? You're in good shape.'
"So I gave him a few dollars, and I tell him, 'Get out of here man. You should be ashamed, you should be embarrassed of what you're doing, man. A lot of guys would kill to be like you."
Recently, the man showed up at the home of St-Pierre's parents asking to speak to him. After being informed St-Pierre no longer lives there, he left a message.
"He goes, 'well I met him a few months ago, and (he) said something to me to shake me up and I just want to say that he changed my life. Now I have a job and I'm doing well, and I want to say thank you. When you see him, tell him I said thank you.'"
Watch the full interview below (the story starts around the nine-minute mark).