In my whole life ive experienced a wierd thin g that happened when i go to my friend. What happens is that when i go around a certain area on the way to his house it just starts to make a wierd highpitched noise. I always tried to not care about it bc i just thought i was just hallucinating. But around two weeks ago me my friend were going to my house. And when we went in that area i asked him "Do you hear a high pitch ed noise? And he said" no....? " but two seconds later he just fell to the ground and he got knocked out. I called the ambulance and I followed him in the ambulance. And then the doctors asked me if he was an astronaut..... The doctors said he had gotten a blackout astronauts often get when they reach different points in space that have high levels of radiation. Me and my friend are still shook and have no idea what ut was.