adventurous spirit and you didn't hold him back. >> well -- >> that you know of. >> reporter: but ben breedlove always mindful of the fact that his days may well be numbered. >> in guess of 2011, while changing classes at austin's we can ladies high ben suddenly collapsed on a bench in cardiac arrest. the school nurse and emergency techs managed to bring him back and later on, ben described what he believed was another glimpse of heaven. >> he said he was in a white room and the peace was more than he could explain. he couldn't describe it. >> reporter: and he told big sister alley he had seen a place he didn't want to leave. >> i asked him if he was happy that he had woken up and he said, i guess. and he started crying really hard. and that was really difficult for me to hear as his sister. >> reporter: you know there are some people who say oh these visions can be explained. >> uh-huh. >> reporter: by medicine, that wasn't heaven. that is just what happens when your heart stops. what would you say? >> i could just see it in his eyes, this peace that he felt. he said it was unexplainable. >> t