From the video description:
Zach Sobiech is 17 years old and diagnosed with osteosarcoma, a rare form of bone cancer that takes the lives of a large percent of its childhood victims. Given only months to live, Zach turned to music to say goodbye. His song "Clouds" spread, and soon, Zach's message was heard across the country. We wanted to help Zach spread his message, and bring awareness to increase support for finding a cure. So, we asked our friends to help out...they did.
"Dan's Our Man" has become the recent slogan of support for a man battling astrocytoma. a form of cancer that develops on the spine. Friends, family and complete strangers have been adding the battle cry to Danny Hammond's Facebook page since it was created last week. While all of the support is greatly admirable, it's Bale's photo with the message: "To a real superhero!" that really sticks out!