What our unfortunate friend didn't know was that with hello, once a picture is tapped, it is sent immediately to the recipient without a chance to preview the photo or change it. As he wrote on his Reddit page, "dinner is going to be $%&*!#@ awkward for Thanksgiving."
But we can learn something from this. One, don't leave any embarrassing pictures of yourself on your phone, and if you are using hello, realize that as soon as a picture is tapped, it is being sent out.
source: Reddit via Phandroid