A story of grind and hustle published on a popular Instagram feed channeled over $2,000 to a food delivery cyclist who was working through a foot injury.

A bicycle courier by the name of Joshua Cavallero runs an Instagram page called BikingDC, and one day he came across a man named Kevin who, like Joshua, was delivering on a bike-Indian food in this case.

But Joshua stopped to chat when he saw that Kevin had a foot cast on and was dismounting the bike right onto a walker. He walked alongside Kevin as he went in with the walker, got the food, put it into his delivery backpack, then walked out again and attempted to climb back on the bike while using the bike lock to secure his walker to the handlebars.

Kevin said he'd been doing it for 2 weeks by then, and that it was dangerous to steer with the walker interfering with his control of the handlebars.

"Bro, what are you doing? Are you serious?" Joshua can be heard saying, to which Kevin responds: "I got bills to pay, bruh."

The video exchange was brief but upbeat, with Joshua asking Kevin for his Cash app details so he could send him a little tip. That video went viral and accumulated 5 million views on Instagram and beyond.

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A post shared by Josh (@bikingdc)

A post shared by Josh (@bikingdc)

The Washington Post, reporting on the story, said that Kevin had been hit by a car in September and spent two weeks in the hospital. His rent was overdue by the time he met Joshua, and the day after he planned to ask his neighbor for a loan. Then he looked at his Cash app account-there was $2,400 in it.

Cavallero had posted his Cash App information along with the video of them meeting, and tips were still flooding in by the time Kevin had finished sifting through the hundreds of positive comments.

"I used to want to be that guy who would get caught in a giveback video, where someone would walk up to me and be like, 'Here's $1,000 dollars!'" Joshua told the Post.

"I was so broke. I wanted someone to bless me. But it's amazing to be able to be the person blessing people. Now, I'm the guy who can put someone's Cash App out there with a sincere story and use my platform to get them back on their feet."

The two recently met up again for lunch. Kevin still had the walker, but he had had a rack fitted to the bike to latch it to. Kevin insisted on paying, which after much protest, he was able to do, though Joshua posted his Cash app details again just for good measure.

WATCH the follow-up with Kevin…

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A post shared by Josh (@bikingdc)

A post shared by Josh (@bikingdc)