Lance Stewart, 18, and his friend Adin Kolansky went into a McDonald's restaurant and ordered 100 McDouble sandwiches.
WATCH: Teens hand out McDonald's sandwiches to Los Angeles homeless
The surprised employees fulfilled the order, which came out to $151. The teens then gave away all the sandwiches to homeless people.
When they ran out, they bought more food at a nearby drugstore.
In just eight hours of posting the video, it had more than 1.8 million views on social media. The teens said they hope the video inspires others to spread kindness.