This video shows the moment 15 year-old Trevor Sullivan from Detroit, Michigan woke after having life-saving heart surgery.
"I'm so happy", 15-year-old Trevor can be seen saying in the video.
"I've been waiting so long. I can breathe again and talk. I feel amazing. I've never felt so good".
The clip has been shared around the world and has been praised for the awareness it has raised for organ donation. The video was originally shared on Facebook page Gift of Life Michigan.
Click here if you would like to carry an Organ Donor Card.
For more information or to donate, please visit the Team Trevor site.